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How much work (in j) must be done to lift a stack of bricks, which has a mass of 400 kg, from the ground to a height of 3 m? (g = 10 m/s2)?
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How much work (in j) must be done to lift a stack of bricks, which has a mass of 400 kg, from the ground to a height of 3 m? (g = 10 m/s2)?

User CaptRespect
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Given: Mass m = 400 Kg; Height h = 3 m; g = 10 m/s²

Required: Work = ?

Formula: Work = Force x distance F = ma a = g F = mg

W = fd

W = mgh

W = (400 Kg)(10 m/s²)( 3 m)

W = 12,000 Kg.m²/s²

W = 12,000 J

User Fpmoles
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