Saturday

October 25, 2014

October 25, 2014

Posted by **physics** on Wednesday, March 11, 2009 at 6:38pm.

here is my answer: mass of bullet = 6gm

= 6/1000 kg = .800kg

let 'v' be speed of block. apply law of conservation of energy

initial energy of (block+bullet)

= final energy of (block+bullet)

kinetic energy=1/2 mV^2 (formula)

solve for v: 1/2x.006*(896)^2=1/2.006*(435)^2 +1/2(1.25)(v)^2

1.25v^2=.006(896^2-435^2)

v=54.27m/s

please show me if there is a simpler way to write this out. please write out the equaiton and fill in the appropriate data.

i think what i have is too confusing

- physics -
**bobpursley**, Wednesday, March 11, 2009 at 7:24pmNo. Energy is not converved when the bullet hits the block, momentum, however, is.

Momentumblock=changemomentumbullet

1250*vblock=6*(896-435)

solve for vblock

- physics -
**physics**, Wednesday, March 11, 2009 at 7:41pmcan you please show me?

**Answer this Question**

**Related Questions**

physics - a bullet with a mass of 6.00 g is fired through a 1.25 kg block of ...

Physics - A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a ...

Physic - A bullet with a mass of 4.0 g and a speed of 736 m/s is fired at a ...

physics - An 7.95 g bullet is fired horizontally into a 9.03 kg block of wood on...

Physics - A bullet with a mass of 0.01kg is fired horizontally into a block of ...

physics - 1) a bullet of mass 0.02 kg is fired into a block of wood of mass 1.5 ...

physics - A ballistics pendulum is a device used to measure the speed of a fast ...

University Physics - A 8.3-g bullet, when fired from a gun into a 1.1-kg block ...

Momentum - A 4.4 g bullet is fired into a block of wood with a mass of 21.3 g. ...

Physics- so confused!! - A bullet with a mass of 5.40 g is fired horizontally at...