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Physics 111A
Lab 126: Conservation of Momentum and Impulse Theorem
11/12/2010
Introduction:
In this lab, we will measure glider velocities before and after collisions (both inelastic
and elastic).
In addition, we will measure the impulse of a collision between the glider
and the force probe and compare it with the change in the momentum of the glider.
Theory:
We start with the definition of momentum p = mv to define momentum transferred
between objects (i.e. in an inelastic collision).
We can also define impulse using a similar
equation J = Ft where J is the change in momentum, F is the force, and t is time (similar
to the equation for power W = Ftd).
We can define the kinetic energy of an elastic
collision in a system using ∑KE = constant, assuming all kinetic energy is conserved in
an elastic collision.
Equipment:
Air Track, Photogates, Gliders, Reflector, Bumpers, Glider Flag, Wax & needle, glider
weights, Motion detector, force probe.
Setup:
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 Spring '11
 Gokce

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