Physics & Astronomy

Spring Apart Carts

Purpose
To demonstrate conservation of linear momentum.
Location
Room 136, shelf N4 (Track is on shelf U4 but is not necessary.)
Description
Two carts are fixed together with Velcro and a loaded spring mechanism between them (top). The trigger is tripped and the spring pushes the carts apart with velocities inversely proportional to their masses, but net momentum remaining zero.