...Momentum

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1.


The red ball in the diagram is chasing after the blue ball; they have the same mass. The speed of the red ball is 3 m/s the speed of the blue ball is 2 m/s. After the collision the red ball rebounds at 2 m/s and the blue ball speeds away at 3 m/s. What was the change in velocity experienced by the red ball during the collision? What was the change in velocity experienced by the blue ball during the collision?  Normally, momentum is conserved during a collision.  However if a huge external force acts during the collision, it may not be.  Was momentum conserved during this collision or not?




2.


Estimate the force on a 145 gram baseball which is traveling at 50 MPH to the right, hits a bat, stays in contact with it for 0.1 second, and 'rebounds' to the left at 50 MPH . Express the result in newtons and in pounds.




3.

A 50 g piece of clay moving at 80 m/s hits a stone, at rest, and sticks to it. The clay momentum must change by

80 Ns

40 Ns

neither A nor B

more data is needed to answer



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