# How much work would it take to push a # 4 kg # weight up a # 15 m # plane that is at an incline of # pi / 4 #?

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The work done is ( W = mgh \cos(\theta) ), where ( m = 4 \ \text{kg} ), ( g ) is the acceleration due to gravity, ( h = 15 \ \text{m} ), and ( \theta = \frac{\pi}{4} ).

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