Homework Help: physics

Posted by Ashley on Monday, November 30, 2009 at 11:11pm.

A box of weight 2N accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal. The normal force acting on the box has a magnitude 1.7 N, the coefficient of kinetic friction between the box and the plane is O.30, and displacement of the box is 1.8 m down the inclined plane.

Two questions:

A. What is the work done on the box by the normal force?
B. What is the work done on the box by the force of kinetic friction?

Can someone give me the formulas to use?

physics - bobpursley, Monday, November 30, 2009 at 11:13pm
The work done by normal force is zero, as work is force x distance in the direction of force.

frictionwork= .30*1.7*1.8 joules

Answer this Question

Related Questions

PHYSICS - PLEASE HELP - A box of weight w=2.0 N accelerates down a rough plane ...
physics - a 25.0kg box is released from rest on a rough inclined plane tilted at...
Physics - a 25 kg box is released from rest on a rough inclined plane tilted at ...
physics - A box slides down a plane 8 m long that is inclined at an angle of 30 ...
physics - a 100Nforce was applied to pull a 20 kg box up on a rough inclined ...
physics - a 100Nforce was applied to pull a 20 kg box up on a rough inclined ...
physics - A block accelerates at 3.3 m/s^2 down a plane inclined at an angle of ...
physics work and newton - A 2.0 kg object starts from rest from the top of an ...
physics - A 175-N box is placed on an inclined plane that makes a 30.0° ...
physics - A 155 N box is placed on an inclined plane that makes a 30.0° ...

For Further Reading

First Name:
School Subject:
Answer: