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DrummingAtom
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Homework Statement
A block rests on a level floor. To move it at a constant velocity, why do you exert less force if you pull it at an angle above the horizontal than if you push it at the same angle below the horizontal?
Homework Equations
The Attempt at a Solution
I know that pushing at an angle below the horizontal is going to add to the weight (w) of the block. I've come up with these expressions:
1) Fpull = w*sin(θ)
2) Fpush = w/sin(θ)
Since w in 1) is going to be multiplied by a number less than 1 it's going to decrease the magnitude of F. And since w in 2) is going to be divided by a number less than 1 it's going to increase the magnitude of F.
Is this the best way to express this relationship? Thanks for any help.