Northwestern Physics Demos                                 Go back to Mechanics
DCS# 1K20.90NWU# M-10Location  opposite 4 C, gliders 3A1, Air blower under cat walk
title: Air Track - Frame of Reference
aka: no friction,  reaction gliders, impulse in collisions 

The low friction of the air track makes it usefull for the following demonstrations:
   Inertia with low friction.
   Two objects pushing on one another. (use a string to hold a compressed spring, burn the string, see the result)
    Elastic and inelastic collisions.
  A wireless camera can be mounted on one cart to show the frame of reference effects during an elastic collision.

   During elastic collisions, how does the more massive cart behave?
    When different mass carts collide, which undergoes the greater acceleration?
pix of plastic rocket in tray