Homework Help: physics

Posted by rory on Thursday, February 28, 2008 at 6:20pm.

A bullet of mass m= 0.0290 kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.55 kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.65 m before stopping. Calculate the speed of the bullet just before it hits the wood. Note. The block is kept from sliding down the incline initially by as small peg

physics - drwls, Thursday, February 28, 2008 at 6:30pm
The distance H that is slides vertically up the incline can be used to determine the velocity V AFTER impact. Conservation of energy gives you

(1/2) V^2 = g H

Knowing V, you can then solve for v (the bullet velocity before impact). Get it from the conservation of momentum relation:
m v = (M+m) V
m = bullet mass
M = wood block mass

v = [(M+m)/m]*sqrt(2gH)

Answer this Question

Related Questions

Physics - A block of mass m 1 sits at rest on a table over a hole in the table. ...
physics - a bullet of mass of 12 grams is fired into a large block of mass 1.5 ...
Physics - A bullet with a mass of 0.01kg is fired horizontally into a block of ...
Physics - 1. A bullet of 0.0500 kg is fired into a block of wood. Knowing that ...
University Physics - A 8.3-g bullet, when fired from a gun into a 1.1-kg block ...
Physics - A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a ...
physiscs - a 15g bullet is fired horizontally into a block of wood with mass 2.5...
physics - A 3.50 g bullet is fired horizontally at two blocks at rest on a ...
Momentum - A 4.4 g bullet is fired into a block of wood with a mass of 21.3 g. ...
physics - A 0.145 kg block is released from rest from the top of a 51.7&#...

For Further Reading

First Name:
School Subject:
Answer: