(adsbygoogle = window.adsbygoogle || []).push({}); HELP!!! 3 physics problems that i am stuck on

Help me out guys. I am in a college physics class and a week and a half into the class i am stuck.

1.) A bullet is moving at 244m/s. It hits a tree and penetrates 8.34mm. (A)What is the average acceleration as it slows? (B) Assuming constant acceleration, how long does it take for the bullet to stop.

I keep coming up with over 7mill m/s for part A... so obviously I am doing something wrong. If someone can just get me started on the right track I think I can figure the rest out.

2.) A ball is thrown straight up at 36m/s How long will it take for the ball to return to it's starting position?

I know it is one of the free fall equations, but i just cant figure out which... also, air resistance is not a factor.

3.) An astronaut lands on a strange, new planet. She discovers she can jump a maximum of 27m @ 6.0m/s. What is the magnitude of acceleration of gravity on the new planet?

Any help on any of these would be greatly appreciated. Thanks.

Stacy in NC

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# Homework Help: HELP 3 physics problems that i am stuck on

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