Shopping security
A fascinating demonstration of center-of-gravity principles. When placed on the diverging bars of the inclined plane, the cone appears to roll up the plane. Upon careful examination, students determine that the axis of the cone is actually moving down the slope of the bars.

Ships within 48 hours · Estimated delivery Jul 22 - Jul 27
US$40
Get nowSign up to your membership to get coupons up to
15%
Get nowOpportunity to enjoy order discount up to 15% off
Top-Converting Item to Boost Your Average Order