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?

NCERT Class IX
Sciences - Main Course Book

Chapter 11. Work and Energy

Answer 1

Given:

Force(F) = 140 N

Distance(s)= 15 m

Work done= force× distance

W= F× s

W= 140 × 15

W= 2100 J

Hence, the work done in ploughing the length of field is 2100 joules.

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Hope this will help you.....

Answer 2

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$\bf{YOUR \: ANSWER : }$

Work is done by the bullocks is given by the expression:

Work done = Force × Displacement

W = F×d

Where,
Applied force, F = 140 N

Displacement, d = 15 m
W = 140×150 = 2100 J

Hence, 2100J of work is done in ploughing the length of the field.

$\boxed{Hope \: its \: help \: you}$