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Collisions

# Collisions - Objectives Identify different types of...

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Copyright © by Holt, Rinehart and Winston. All rights reserved. Objectives Identify different types of collisions. Determine the changes in kinetic energy during perfectly inelastic collisions. Compare conservation of momentum and conservation of kinetic energy in perfectly inelastic and elastic collisions. Find the final velocity of an object in perfectly inelastic and elastic collisions.

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Copyright © by Holt, Rinehart and Winston. All rights reserved. Collisions Perfectly inelastic collision Conservation of momentum for a perfectly inelastic collision: m 1 v 1,i + m 2 v 2,i = (m 1 + m 2 ) v f total initial momentum = total final momentum

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Copyright © by Holt, Rinehart and Winston. All rights reserved. Sample Problem Kinetic Energy in Perfectly Inelastic Collisions Two clay balls collide head-on in a perfectly inelastic collision. The first ball has a mass of 0.500 kg and an initial velocity of 4.00 m/s to the right. The second ball has a mass of 0.250 kg and an initial velocity of 3.00 m/s to the left.What is the decrease in kinetic energy during the collision? 1. Define Given: m 1 = 0.500 kg m 2 = 0.250 kg v 1,i = 4.00 m/s to the right, v 1,i = +4.00 m/s v 2,i = 3.00 m/s to the left, v 2,i = –3.00 m/s Unknown: KE = ?

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Collisions - Objectives Identify different types of...

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