- #1

gunjay

- 2

- 0

## Homework Statement

A block of mass m=18kg is pushed horizontally with a force of F

_{p}=150N up an inclined plane of angle θ=32° and coefficient of friction of μ=0.10, a distance of x=5m. a) What is the work done by F

_{p}. b) Work done by the gravitational force. c) Work done by the normal force.

## Homework Equations

W = ∫Fdl

Force in the same direction as displacement.

or W = F*x

## The Attempt at a Solution

My main question is how is work affected by friction?

This question is like a part 2 where the first one had no friction and this one does but i don't see how friction gets involved at all.

a) The F

_{p}has 2 components, one that moves parallel to the inclined plane and the other perpendicular to the plane. so F

_{px}=F

_{p}cosθ. So including friction do i do W = (F

_{px}-F

_{f})*x or just W=F

_{px}*x or ?

b) W

_{g}=∫F

_{g}dx = mgsinθ*x

c) W

_{N}=∫F

_{N}dx = 0 = there is no displacement in the direction of the normal force.