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How much work is required?

1. Homework Statement
How much work is required to push a 25-kg block up 2m up a frictionless 30 degree incline at a constant speed?


2. Homework Equations
W=F(delta X) ; W=(F cos theta)(delta X)


3. The Attempt at a Solution
I did n=mg -- n=(25)(9.8)=245 & that is the correct answer..but I don't understand how.
 

Answers and Replies

458
0
Well, by coincidence you didn't factor in the angle and still go the right answer.

Start off by having a coordinate plane that is parallel to the incline of the ramp. Figure out what component of the total weight (mg) you are pushing up the ramp and by what distance.
 
I don't think I understand what you mean. The distance is 2m and wouldn't the total weight simply be the weight of the block?
 

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