- #1
fixedglare
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Homework Statement
Given:
Work = 12000 J
Weight: 800 N
displacement: 200 m
Force: 120 N
angle = ?
Homework Equations
W = Fd
W = Fd cos θ
cos -1 (W/Fd) = θ
The Attempt at a Solution
First I added the 2 forces together.
800 + 120 = 920 N
calculated work; 200 m * 920 N = 184000 J
then used the second formula;
cos -1 (12000 J /184000 J) = 86.3°
but the answer in my book says the answer is supposed to be 60°...
help me please.