Collisions in One Dimension Part A On a frictionless horizontal air table, puck

Question

Collisions in One Dimension Part A On a frictionless horizontal air table, puck A (with mass 0.255 kg) is moving toward puck B (with mass 0.375 kg), which is initially at rest. After the collision, puck A has velocity 0.125 m/s to the left, and puck B has velocity 0.646 m/s to the right. What was the speed vAi of puck A before the collision? Hints UN= 0.825 m/s Submit Mv 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 K, the change in the total kinetic energy of the system that occurs during the collision. Hints K = 6.878625-10-3 Submit My Answers Give Up Incorrect; Try Again; 4 attempts remaining Provide Feedback Continue

Explanation / Answer

Change in KE = 0.5mA*vAi^2 - (0.5mA*vAf^2 + 0.5mB*vBf^2)

= 0.5*0.255*0.825^2 - (0.5*0.255*0.125^2 + 0.5*0.375*0.646^2)

= 0.00654 J answer

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