How Much Work is Done Pushing a Crate Up a Plank?

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The discussion focuses on calculating the work done in pushing a crate up a plank and the increase in potential energy (PE) once the crate is on a platform. The work done is calculated using the formula W=Fxd, resulting in 2450 N. The increase in potential energy is determined using PE=mgh, yielding a value of 1176 N. The calculations assume no friction and that the force is applied along the length of the plank. The participant expresses satisfaction with their correct solution.
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Homework Statement


force F is required to push a crate of mass m up a plank of length L into a truck whose platform is a vertical distance h above the road.

a)How much work is done pusing the crate up the plank m=100kg, L=5m, F=490N h=1.2m
b)what is the increase in PE of the crate once the crate is on the platform


Homework Equations


W=Fxd
PE=mgh



The Attempt at a Solution



ok so my working is

W=Fxd
W=490Nx5m
W=2450N

and

PE=mgh
PE=(100kg)(9.8ms-1)(1.2m)
PE=1176 N

Hmmmmmmm...i think they are right
 
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Yeah it looks ok, provided no friction is involved and F is directed along the length of L.
 
Excellent i finally got one right by myself!
 

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