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Calculate the work done by a car against gravity in moving along a straight horizontal road.

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Calculate the work done by a car against gravity in moving along a straight horizontal road. The mass of the car is 400 kg and the distance moved is 2m.

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Work done by a car against gravity W = weight of car × displacement × cos θ

cos 90° = 0

Hence, θ = 90° , as gravity acting vertically downward

So, W = mgs × 0

W = 0

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