SELECT * FROM question_mgmt as q WHERE id=4193 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=191 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Work and Energy a pair of bullocks exerts a force of 140 n on a pl

Question:

A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?

Answer:

Applied force, F = 140 N

Displacement, d = 15 m

Work done = force x displacement

W = 140 × 15 = 2100 J

Work done is 2100 J.


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