Homework Help: physics

Posted by Brian on Friday, November 6, 2009 at 4:21pm.

A bullet of mass 8.0 g is fired horizontally into a 2.2 kg wooden block at rest on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.40. The bullet comes to rest in the block, which moves 2.30 m. (a) What is the speed of the block immediately after the bullet comes to rest within it?(b) At what speed is the bullet fired?

physics - bobpursley, Friday, November 6, 2009 at 4:48pm
The energy in the block/bullet combo is forcefriction*distancemoved. Figure that out. Then, set that equal to initial KE of the block/bullet, thence find the initial velocity.
Now use conservation of momentum to find speed of the bullet.
physics - nicole, Tuesday, March 30, 2010 at 11:11pm
23.3

Answer this Question

Related Questions

Physics - A bullet of mass 5.15 g is fired horizontally into a 2.74 kg wooden ...
physics - A bullet of mass 4.7 g is fired horizontally into a 2.4 kg wooden ...
Physics - A 12 g bullet is fired horizontally into a 96 g wooden block initially...
physics - A 11.0 g bullet is fired horizontally into a 108 g wooden block that ...
Physics HELP! - A 20.0 g bullet is fired horizontally into a 85 g wooden block ...
physic - Hi!could anyone help me with this problem please because I been trying ...
Physics- Elena please help! - A 20.0 g bullet is fired horizontally into a 85 g ...
Physics - A 11.0-g bullet is fired horizontally into a 101-g wooden block that ...
physics - A 10.0-g bullet is fired horizontally into a 101-g wooden block that ...
physics - A 16.0 g bullet is fired horizontally into a 87 g wooden block that is...

For Further Reading

First Name:
School Subject:
Answer: