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June 29, 2015

Homework Help: physics

Posted by Elisa on Sunday, July 6, 2008 at 11:01pm.

1. A 3.25 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0 with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.195 s, what is the average force exerted on the ball by the wall?

x component: N
y component: N

2. A 7.0 g bullet is fired into a 1.5 kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 11 cm. Find the initial speed of the bullet.

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