Posted by **kent** on Sunday, September 1, 2013 at 11:23am.

A 20-g bullet is fired horizontally into a 980 g block of wood suspended by a long cord. The bullet sticks in the block and causes the block to swing 15 cm above its initial level.

a) What is the momentum of the bullet before it hit the block?

b) Determine the velocity of the bullet, u, before it hit the block.

c) If the bullet-block system oscillates continuously, what would be the values of T, f, and

w, if the length of the cord is 1.96 m?

- pHysics !! -
**bobpursley**, Sunday, September 1, 2013 at 11:39am
you know the height it went, what PE does it have, At the bottom when starting, it had that KE. From that, determine the velocity of block/bullet at impact.

now use conservation of momentum at impact

(M+m)V= momentumbullet

and now determine velocity bullet

Momentumbullet=m*v

c. I am not certain what your w means, angular momentum, or angular freq.

for T, T=2PI sqrt(length/g)

f= 1/T

## Answer this Question

## Related Questions

- Physics - A 15-g bullet is fired horizontally into a 3.000-kg block of wood ...
- Physics - A bullet with a mass of 0.01kg is fired horizontally into a block of ...
- physics - A 10-g bullet of unknown speed is shot horizontally into a 2-kg block ...
- Nm juniour clg,rkl - A 20gm bullet collision is fired horizontaly into a 5kg ...
- Mechanical engineering - A bullet of mass 50 grams is fired horizontally into a ...
- PHYSICS - A 15g bullet is fired horizontally into a block of wood with a mass of...
- Momentum ~ Physics - A 25-g bullet is fired at 150 m/s into a 2.0-kg block of ...
- physics - when a 0.05kg bullet is fired into a block that is suspended by a long...
- Physics - If a 5.40g bullet is fired horizontally into a suspended(hanging)10kg...
- Physics - If a 5.40g bullet is fired horizontally into a suspended(hanging)10kg ...

More Related Questions