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December 20, 2014

December 20, 2014

Posted by **Amy** on Sunday, January 16, 2011 at 9:55pm.

1. Joe is sledding down a snow hill when he collides with Mike half way down the hill. Joe and the sled have a mass of 65 kg and their velocity before the collision was 12 m/s. If Mike has a mass of 55 kg, what velocity would Joe, Mike, and the sled have after the collision?

2. A 3 kg cart is moving along when it strikes a 2 kg cart (initially at rest). The velocity of the two-cart combination after the collision is 4 m/s. Calculate the velocity of the 3 kg cart before the collision.

3. Tyler is standing at the 10-yard line waiting to catch the initial kick-off. The .75 kg football experiences a change in velocity of 12 m/s in .17 s when caught by Tyler. What force does Tyler apply on the football?

- Physics -
**bobpursley**, Sunday, January 16, 2011 at 10:57pm1) assuming they stuck together after the collision?

Assuming that, momentum is conserved.

momentum before= momentum after

65*12+0=(65+55)V solve for V

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