Homework Help: Physics

Posted by Brigid on Tuesday, April 7, 2009 at 10:29pm.

I'm having a problem understanding a question. "If a man exerts a 200N force while pushing a crate 5.0 m across a floor against a frictional resistance of 40N, how much energy was expended by the person pushing?" I can figure out work done on the box and those sorts of questions but I don't get what is meant by how much energy is the man expending.

Physics - drwls, Wednesday, April 8, 2009 at 1:51am
The work expended is the applied force (200 N) times the distance the crate moved (5.0 m). The amount of friction does not affect that result.
Physics - Brigid, Wednesday, April 8, 2009 at 11:54am
Thank you.

Answer this Question

Related Questions

physics - A worker exerts a 140 N horizontal force on a 41 kg crate. The crate&#...
Physics - You are pulling a 60-kg crate across a level floor with a rope. If a ...
physics - A man pulls a crate of mass 53.0 kg across a level floor. He pulls ...
physics - A man pulls a crate of mass 63.0 kg across a level floor. He pulls ...
physics - A man pulls a crate of mass 61.0 kg across a level floor. He pulls ...
college physics - A man pushing a crate of mass m = 92.0 kg at a speed of v = 0....
Physics - A 51.0 kg crate rests on a level floor at a shipping dock. The ...
physics - i apply an 800 N force to the crate a. how long would it take the ...
physics - i apply an 800 N force to the crate a. how long would it take the ...
physics - If Frankie the kangaroo climbed out of the crate and pushed the crate ...

For Further Reading

First Name:
School Subject:
Answer: