Homework Help: physics

Posted by april on Tuesday, February 3, 2009 at 6:51pm.

A horizontal force of 200 N is applied to a 55 kg cart across a 10 m level surface. If the cart accelerates at 2 m/s^2 then what is the work done by the force of friction as it acts to retard the motion of the cart? Hint calculate the force of friction using newtons second law.

the answer is -900J...but how do i get that?

physics - bobpursley, Tuesday, February 3, 2009 at 6:58pm
There are a couple of ways to do this.

Netforce= ma
200N+friction=ma
-200N + ma=friction solve for friction force.
Work done on by friction=forcefricion(10m)
Now notice
physics - april, Tuesday, February 3, 2009 at 7:06pm
thanks

Answer this Question

Related Questions

physics - a warehouse worker pulls on the handles of a 96.0 kg cart witha net ...
physics - A 14.0 kg cart is moving with a velocity of 7.25 m/s down a level ...
Physics - PLEASE SHOW ALL WORK A 15.0-kg cart is moving with a velocity of 7.10 ...
Physics - If a force F=200N is applied to the 34 kg cart, determine the time for...
physics - A 1.5-kg cart is pulled with a force of 7.3 N at an angle of 40° ...
Physics - frictional force - Pushing a grocery cart with a force of 95N applied ...
physics - A person pushes a 10.5-kg shopping cart at a constant velocity for a ...
Physics - A grocery cart with a mass of 18 kg is pushed at constant speed along ...
physics - a loaded cart, mass220-kg is pulled across the ground with the force ...
11th garde physics - A grocery cart with a mass of 18 kg is pushed at constant ...

For Further Reading

First Name:
School Subject:
Answer: