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Physics Assistance!
As part of a forensic experiment, a 50-g bullet is fired horizontally into a 2.0kg wooden pendulum. The pendulum with the bullet imbedded in it rises 15cm vertically from its initial position.Calculate the velocity of the block and bullet just after the collision
what is the velocity of the bullet just before impact?
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- By masheen |
- Category: physics |
- Grade level: 12th grade (18)
- Jan/16/2010 |
- Answers to this question: 1
|
Answer by: scott8148
First Answer
the first part is an energy calculation ___ kinetic equals potential
1/2 m v^2 = m g h
v = sqrt (2gh) = sqrt (2 * 9.8 * .15) (answer is in m/s)
the second part is a momentum calculation
[mass of block plus bullet] * [v from first part] equals
[mass of bullet] * [velocity of bullet]
v = [2.05 / .05] * [velocity from first part]
1/2 m v^2 = m g h
v = sqrt (2gh) = sqrt (2 * 9.8 * .15) (answer is in m/s)
the second part is a momentum calculation
[mass of block plus bullet] * [v from first part] equals
[mass of bullet] * [velocity of bullet]
v = [2.05 / .05] * [velocity from first part]
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- Jan/26/2010 |
- Answers by scott8148: 274 |
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