Thursday
April 2, 2015

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.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - A rope exerts a constant horizontal force of 203N pulling a 68-kg ...
Physics - A man pushes a lawn mower on a level lawn with a force of 200N it 40% ...
physics - A worker exerts a 140 N horizontal force on a 41 kg crate. The crate's...
Physics - A rope exerts a constant horizontal force of 203N pulling a 68-kg ...
Science-Physics - A mover is pushing a crate across the floor. He exerts a force...
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 ...
Physics - Question # 1 Marks = 12 A worker pushes 25Kg crate a distance of 5m ...
Physics - A person is pushing on a refrigerator that sits on a level floor. Use ...

Members