On a frictionless horizontal air table, puck A (with mass 0.253 kg ) is moving t

Question

On a frictionless horizontal air table, puck A (with mass 0.253 kg ) is moving toward puck B (with mass 0.365 kg ), which is initially at rest. After the collision, puck A has velocity 0.119 m/s to the left, and puck B has velocity 0.649 m/s to the right.

Collisions in One Dimension Part A On a frictionless horizontal air table, puck A (with mass 0.253 kg ) is moving toward puck B (with mass 0.365 kg), which is initially at rest. After the collision, puck A has velocity 0.119 m/s to the left, and puck B has velocity 0.649 m/s to the right What was the speed vAi of puck A before the collision? Hints Ai-0.817 m/s Submit My Answers Give Up Correct If you are required to use the answer obtained for a subsequent hint or part, use your unrounded/full precision answer. Part B Calculate AK, the change in the total kinetic energy of the system that occurs during the collision. Hints : 15.77.10 3 Submit My Answers Give Up Incorrect; One attempt remaining; Try Again

Explanation / Answer

KE before the collision= 1/ 2(0,253) (0.817^2) = 0.0844 J

KE after collision = 1/ 2( 0.53) (0.119)^2 + 1/2 (0.365) (0.639^2) = 0.0783 J apprx

cjhange=-0.00613 J apprx or - 6.13 x 10^-3

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