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Q4. A pair of bullocks exerts a force of 140 N on a plough. The field beingploughed is 15 m long. How much work is done in ploughing the length of the field?Ans. Force 140Ns 15m- 140 N x 15 m-2100 NmW 2100 J.. Work done in ploughing the length of the field is 2100 J.

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