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Homework Statement
Estimate (to the nearest order of magnitude) how much work I must do to pick up a 12 kg box to a height of 1.3m. Does it mattert how I pick up the box (fast or slow, straight up or along a curvy path, etc.)?
Homework Equations
W=Fcos(x)S
The Attempt at a Solution
9.8(m/s^2)*12 kg = 117.6N
W=Fs
W=Fcos(angle)s
s=1.3m
If the box was lifted straight up, the angle is zero.
W=117.6cos(90)(1.3m)
W=0
It does not matter if you pick the box up slow or fast.I'm confused at the curvy part of the question. If I pick up the box at an angle, is it always negative since I'm doing work against gravity?