Wednesday

July 23, 2014

July 23, 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

**Related Questions**

Physics - Joe is sledding down a snow hill when he collides with Mike half way ...

physics - You and your friend are sledding on two sides of a triangle-shaped ...

Physics - Marcus and Santa are sliding down a snowy hill that is 13.3 m high. On...

Pyhsics - A sled slides down a snow-covered hill at CONSTANT SPEED. If the hill ...

Physics - A child insists on going sledding on a barely snow-covered hill. The ...

phys. help - A 30-kg child coast down a hill on a 20-kg sled. She pushes off ...

physics - A child and a sled have a combined mass of 87.5 kg slides down a ...

Science - Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35...

Science - Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35...

PHYSICS - Jamal pulls a 150-N sled up a 28.0 degrees slope at constant speed by ...