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Lab 126

# Lab 126 - Lab 126 Conservation of Momentum Group 1 Russell...

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Lab 126 – Conservation of Momentum 11/3/06 Group 1: Russell Adams Pawel Bokota Vahid Hamidullah Physics 111A TA: Ke Su ( [email protected] ) 1. - Objective Measure the velocities of gliders of various masses before and after both elastic and inelastic collisions. In addition, we will directly 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. 2. – Theory 1. Linear Momentum: P = mv p = linear momentum, m = mass, and v = velocity Newton’s law for linear momentum: linear momentum p may change if and only if there is external force acting on a system. Collisions between the elements of a system don’t change the total linear momentum of the system (normal forces acting during the collision are “internal” forces). 2. Impulse: J = Ft external force F acting during time t does change the linear momentum of the system by J= Δp 3. Elastic Collision: Σ all KE = constant Collision is fully elastic if Kinetic Energy of the

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