{"product_id":"new-physical-study-aids-centrifugal-force-equipment-school-physical-teaching-equipment-centrifugal-orbit-experiment-aids","title":"Centripetal force demonstrator, desktop looping track - CYCLONE","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 .5rem;letter-spacing:.3px;color:#1A1A1A}\n.aa .aa-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:3px 10px;border-radius:20px;margin:0 4px 4px 0;vertical-align:middle;font-family:Georgia,serif}\n.aa .aa-badge-or{background:#FAC775;color:#1A1A1A}\n.aa .aa-badge-brun{background:#5C3A1E;color:#FFF9E8}\n.aa .aa-badge-noir{background:#1A1A1A;color:#FAC775}\n.aa 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summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eThe Lab\u003c\/span\u003e \u003cspan class=\"aa-badge aa-brun\"\u003eWooden base\u003c\/span\u003e A marble released at the top of a slope, a moment of suspense, then it climbs, goes upside down at the top of a vertical circle, and comes back down without ever falling. This \u003cstrong\u003ecentripetal force demonstrator\u003c\/strong\u003e reenacts the founding experience of roller coasters right on your desk. Its silhouette consists of a single gesture: a \u003cstrong\u003epolished metal rail\u003c\/strong\u003e descending a slope, curling into a \u003cstrong\u003eunique vertical loop\u003c\/strong\u003e, and then shooting toward a small black cap at the end of the course. The whole rests on a \u003cstrong\u003edark wooden rectangular base\u003c\/strong\u003e that gives it the look of an instrument from a cabinet of curiosities. Originally designed as \u003cstrong\u003eeducational physics equipment\u003c\/strong\u003e, it speaks as much to the high schooler discovering \u003cstrong\u003ecircular dynamics\u003c\/strong\u003e as it does to the nostalgic engineer or the simply curious. Each launch poses the same question: why doesn't the marble fall when it is upside down? The answer lies in \u003cstrong\u003espeed\u003c\/strong\u003e, \u003cstrong\u003ecurvature\u003c\/strong\u003e, and a handful of elegant equations that the object suddenly makes tangible. A \u003cstrong\u003edemonstrative desk object\u003c\/strong\u003e, sober and expressive, that turns a Newton's law into a spectacle of a few seconds.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe model\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#5C3A1E 0%,#704028 40%,#5C3A1E 70%,#8B5E2A 100%);\"\u003eUNIQUE LOOP\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eUnique model — one loop\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003ePolished metal rail, metal marble, dark wood base\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eCentripetal force, or the art of turning without falling\u003c\/h3\u003e\n\n\u003cp\u003eAny object in motion tends to continue its path in a straight line: this is the \u003cstrong\u003eprinciple of inertia\u003c\/strong\u003e, formulated by Newton in 1687. For a marble to trace a circle, a force must constantly pull it toward the center: this is the \u003cstrong\u003ecentripetal force\u003c\/strong\u003e, from the Latin \u003cem\u003ecentrum\u003c\/em\u003e (center) and \u003cem\u003epetere\u003c\/em\u003e (to seek). In the loop, this role is played by the rail itself, which pushes the marble inward, aided at the top by gravity. What one feels on a ride as a push toward the outside, the famous \"centrifugal force,\" is merely the manifestation of this inertia seen from the passenger's seat.\u003c\/p\u003e\n\n\u003cp\u003eAt the highest point, the marble only stays pressed against the rail if it is going fast enough: the square of its speed must exceed the product of gravity and the radius of the loop (\u003cstrong\u003ev² ≥ g·R\u003c\/strong\u003e). Below this threshold, the rail stops holding it, and it drops. As early as the 1840s, attractions called \"centrifugal railways\" thrilled the Parisian public with this same principle; the loops of modern amusement parks are their direct heirs.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you'll love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA law made visible\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCentripetal force ceases to be a formula on the blackboard: it can be seen, replayed, and discussed in a few seconds.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eLook of an antique instrument\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe polished metal that catches the light and the dark wood of the base compose an object worthy of a library or an engineer's study.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eOne loop, zero distractions\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe path can be read at a glance: a slope, a circle, an exit. Ideal for focusing attention on the essentials.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNo power supply\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOnly gravity sets the marble in motion: no batteries, no cables, nothing to recharge.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eReady-to-use lesson support\u003c\/span\u003e\u003cspan class=\"ds\"\u003eTeachers, parents, and science communicators have a ready-to-use demonstration for talking about inertia and energy.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA curiosity magnet\u003c\/span\u003e\u003cspan class=\"ds\"\u003ePlaced on a desk, it draws the hands of visitors and starts conversations better than any paperweight.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des brun\"\u003e\n\n\u003cp class=\"t\"\u003eFrom the fairground ride to the engineer’s desk\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eThere is an almost childlike pleasure in watching a marble defy the fall. 19th-century fairground showmen understood this by installing their first looping circuits, where intrepid passengers went upside down to the cheers of the crowd. Physicists saw in it an ideal demonstration of the link between \u003cstrong\u003espeed\u003c\/strong\u003e, \u003cstrong\u003eradius of curvature\u003c\/strong\u003e, and \u003cstrong\u003egravity\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis demonstrator takes up this dual lineage. Its unique, clean, and legible loop recalls the engraved plates of mechanics treatises; its dark wood base evokes the demonstration instruments of old science classrooms. On a desk, it becomes a ritual: one releases the marble, holds one's breath, watches it go upside down and return. A little theater of \u003cstrong\u003eNewtonian mechanics\u003c\/strong\u003e, replayed at will, reminding us that the laws of nature are as beautiful as they are exact.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eStaging the loop in four steps\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eChoose the location.\u003c\/strong\u003e Place the base on a perfectly flat and stable surface: an inclined or wobbly table alters the trajectory and may prevent the marble from completing its loop.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePosition the marble at the start.\u003c\/strong\u003e Place the metal marble at the very top of the slope, immobile, holding it with your fingertip.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eRelease without pushing.\u003c\/strong\u003e Simply open your finger: gravity is enough. A push would distort the experiment by adding initial velocity.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve and vary.\u003c\/strong\u003e Follow the marble through the loop and then to the black cap. Repeat by releasing it lower down the slope to discover the point at which it no longer clears the summit.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eThis model (one loop)\u003c\/th\u003e\n\n\u003cth\u003eSingle or double loop rail\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of loops\u003c\/td\u003e\n\n\u003ctd\u003eOne, vertical\u003c\/td\u003e\n\n\u003ctd\u003eOne or two depending on version\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eRail\u003c\/td\u003e\n\n\u003ctd\u003eMetal, polished steel appearance\u003c\/td\u003e\n\n\u003ctd\u003eV-profile aluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eRectangular dark wood\u003c\/td\u003e\n\n\u003ctd\u003eWood, length ≈ 40 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eMarble(s)\u003c\/td\u003e\n\n\u003ctd\u003eMetal marble shown\u003c\/td\u003e\n\n\u003ctd\u003eSteel marble and 2.5 cm plastic marble\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eEnd of course\u003c\/td\u003e\n\n\u003ctd\u003eSmall black cap\u003c\/td\u003e\n\n\u003ctd\u003eMarble catch net\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\u003ctd\u003eLoop radius ≈ 7 cm (and ≈ 3.5 cm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIdeal usage\u003c\/td\u003e\n\n\u003ctd\u003eDemonstrative desk object\u003c\/td\u003e\n\n\u003ctd\u003eComparative experiments in class\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eBoth demonstrators tell the same physics story with different temperaments: this one focuses on the legibility of a single loop, the other on experimentation. To compose a real science corner, browse all of our \u003ca href=\"\/collections\/objets-scientifiques\"\u003escientific objects from The Lab\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e this demonstrator is sourced from \u003cstrong\u003ephysics teaching equipment\u003c\/strong\u003e. Its exact dimensions and weight are not provided by the manufacturer; this sheet sticks to what the product photo shows: a single-loop rail on a dark wood base, presented with a metal marble.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e before each demonstration, wipe the rail and the marble with a dry microfiber cloth. A fingerprint or a grain of dust is enough to slow the marble down and make it miss the summit. A small spirit level placed on the base ensures perfect horizontality.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical characteristics\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eCentripetal force demonstrator (looping rail)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of loops\u003c\/td\u003e\n\n\u003ctd\u003eOne vertical loop\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRail\u003c\/td\u003e\n\n\u003ctd\u003eMetal, shiny polished steel appearance\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMarble\u003c\/td\u003e\n\n\u003ctd\u003eMetal (shown in product photo)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eDark wood, rectangular shape\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eEnd of course\u003c\/td\u003e\n\n\u003ctd\u003eSmall black cap at the end of the rail\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eGravity only, no power source\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConcepts illustrated\u003c\/td\u003e\n\n\u003ctd\u003eInertia, centripetal force, potential and kinetic energy\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eClassroom demonstration, desk object\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDelivery assembled or in kit\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e the marble is a \u003cstrong\u003esmall part\u003c\/strong\u003e that can be swallowed: this demonstrator is not suitable for children under 3 years old and should be used under adult supervision with younger ones. Do not force the rail: a deformed loop will no longer guide the marble correctly. Do not throw the marble by hand off the path.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA gift idea that goes full circle\u003c\/h3\u003e\n\n\u003cp\u003eFor a \u003cstrong\u003ephysics teacher\u003c\/strong\u003e at the end of the school year, an engineering student, a mechanics enthusiast, or a colleague who has everything, this demonstrator is a gift that gets noticed and shared. It also accompanies a retirement, a new desk, or a baccalaureate success with a touch of scholarly humor.\u003c\/p\u003e\n\n\u003cp\u003eTo extend the pleasure, pair it with a puzzle or an intriguing desk object from our \u003ca href=\"\/collections\/casse-tetes-et-bureau\"\u003epuzzles and desk objects\u003c\/a\u003e collection, or explore the other \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ephysics and movement\u003c\/a\u003e experiments from The Lab.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhy doesn't the marble fall at the top of the loop?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBecause it's going fast enough. At the summit, the marble needs a \u003cstrong\u003eforce directed toward the center\u003c\/strong\u003e to continue turning. As long as its speed is sufficient, gravity alone is not enough to provide this force: the rail must still push it inward, which keeps it pressed against it. If the speed drops below the threshold defined by \u003cstrong\u003ev² = g·R\u003c\/strong\u003e, gravity becomes \"too strong\" for the circular trajectory and the marble leaves the rail. This is exactly what ensures passenger safety in an amusement park loop: the entry speed is calculated with a large margin.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes it need batteries or an electrical power supply?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo. The demonstrator works \u003cstrong\u003esolely thanks to gravity\u003c\/strong\u003e. The energy the marble needs to travel through the loop is provided by the starting height: by descending the slope, it converts its potential energy into speed, then spends part of this speed to climb back to the top of the circle. No motor, no battery, no cable is involved. This is precisely what makes the experiment so expressive: everything observed stems from the initial height, the shape of the rail, and friction. Simply place the object on a flat surface to be ready for use, at any time.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the difference with The Lab’s single or double looping rail?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBoth objects illustrate \u003cstrong\u003ecentripetal force\u003c\/strong\u003e, but they are not aimed at the same use. This model focuses on \u003cstrong\u003ea single loop\u003c\/strong\u003e: its path can be understood at a glance, making it a demonstrative desk object and an excellent starting point for a discussion. The other demonstrator, more laboratory-oriented, offers a version with two loops of different radii, two marbles of different materials, and a catch net, to multiply comparative trials. If you are looking for a sober object to display and have people try, this one is ideal; for a complete practical session, the other will be richer.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat happens if the marble doesn't clear the loop?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThat is an experiment in itself. If the marble is released too low on the slope, it does not accumulate enough speed: it climbs into the loop, slows down, then \u003cstrong\u003edrops before the summit\u003c\/strong\u003e and falls back. In theory, for a marble that slides without friction, you would need to start from a height at least equal to \u003cstrong\u003etwo and a half times the radius\u003c\/strong\u003e of the loop; a marble that rolls must start a little higher, because part of its energy is used to make it spin on itself. Also, check that the base is perfectly horizontal and that the rail is clean: dust or a slight tilt is enough to make a pass fail.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eCan it be used in class or with children?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eYes, that is its primary vocation: it is \u003cstrong\u003ephysics teaching equipment\u003c\/strong\u003e. In middle school, it simply illustrates the conversion between height and speed; in high school and higher education, it allows for approaching \u003cstrong\u003eNewton's second law in circular motion\u003c\/strong\u003e, the concept of support reaction, and the condition for clearing the summit. With young children, the object is fascinating, but it must remain under adult supervision: the marble is a small part that can be swallowed, and the demonstrator is not suitable for those under 3. For older ones, it is a great starting point for asking questions and formulating hypotheses.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are the dimensions of the demonstrator?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer \u003cstrong\u003edoes not provide dimensions or weight\u003c\/strong\u003e for this model, and we prefer not to offer approximate figures. The product photo shows a set composed of a slope, a single vertical loop, and an exit rail fixed to a \u003cstrong\u003erectangular dark wood base\u003c\/strong\u003e, with a metal marble and a small black cap at the end of the course. If space is a deciding factor for you, for example for a specific shelf or display case, write to us before your order: we will provide any additional information we have on this object.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain the rail and the marble?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eMaintenance is minimal. Regularly dust the rail with a \u003cstrong\u003edry microfiber cloth\u003c\/strong\u003e, following the entire length of the loop, and wipe the marble in the same way: fingerprints and dust create friction that slows the marble down. Avoid aggressive household products and water on the \u003cstrong\u003ewooden base\u003c\/strong\u003e, which could stain or swell. Keep the marble near the object, in a small dish for example, so as not to lose it. Finally, handle the demonstrator by the base rather than the loop: it is the precise geometry of the rail that ensures successful passes.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":54860801474883,"sku":"1005009392089083-Default Title","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sf719fd3c457d47dda14a9827b529f1a3X.webp?v=1791060883","url":"https:\/\/atelier-atypique.com\/products\/new-physical-study-aids-centrifugal-force-equipment-school-physical-teaching-equipment-centrifugal-orbit-experiment-aids","provider":"Atelier Atypique","version":"1.0","type":"link"}