Florida Atlantic University - PHY 2048LPhysics Lab Report Experiment 6. Collision. 1. Purpose: Verify energy conservation law that when the potential energy of a ball is converted to its energy. Study elastic and inelastic collisions between two balls.

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PHY 2048L Experiment #6 Collision Physics lab 1 Tuesday & Thursday 10-11:50am 06/08/19 TA: Mukunda Pudasaini Purpose Verify energy conservation law that when the potential energy of a ball... is converted to its energy. Study elastic and inelastic collisions between two balls. Theory The maximum potential energy should be equal to the maximum kinetic energy, or the potential energy of a ball #1 should be equal to the kinetic energy of ball right before it collides with another. Elastic Collision – a collision in which both the momentum and kinetic energy of a two-ball system are conserved before and after collision. We demonstrate elastic collision by colliding two metal balls hanging from on strings. Inelastic Collision- a collision in which the momentum is conserved but not the kinetic energy of the two ball system. We demonstrate inelastic collision by using Velcro pads on the sides of the colliding metal balls. The energy conservation law: (P⃑) ⃗_before=P ⃗ ⃗_1=mv ⃗ ⃗_1, K_before=K_1+K_2=1/2mv_1^2 Elastic Collision If both the momentum and kinetic energy of the two-ball system are conserved before and after collision, then it is called an elastic collision Upon elastic collision, ball #1 stops and ball #2 swings to the left. Ball #1 loses its velocity, momentum and kinetic energy while ball #2 Inelastic Collision If the momentum but not the kinetic energy of the two-ball system is conserved before and after collision, it is called an inelastic collision: P ⃗_before=P ⃗_after and K_before≠K_after. Questions at the end Hold the smallest ball (red) at arm’s length from your body and release it at a drop height h_0. The ball will be bounced upward after it hits the ground and reaches a height h_A. Is h_A>h_0 or h_A<h_0? Why? Follow the steps and instructions shown in the figures to play the toy “AstroBlaster.” Comparison of the observations in A and B shows that h_B≫h_0 (h_0>h_A), why? Assume all the collisions are elastic and the air resistance can be neglected in both (a) and (b). Use the energy and momentum conservation laws to prove: [Show More]

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