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8.5 Exercise 3

Avg difficulty 2.5

Mass A (2.0 kg) is moving with an initial velocity of 15 m/s in the +x-direction, and it collides with mass B (5.0 kg), initially at rest. After the collision, the two objects stick together and move as one. What is the change in kinetic energy of the system as a result of the collision?

  1. no change
  2. decrease by 225 J
  3. decrease by 161 J
  4. decrease by 64 J

OpenStax College Physics 2e, 8.5 Inelastic Collisions in One Dimension, exercise 3

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.