VI. Numericals:
1. How much force is applied on a body when 300 J of work is done in displacing the body
through a distance of 5 m in the direction of force?
[Ans.60 N)
2. An engine does 36,000 J of work when a force of 6000 N is applied on it. What is the
displacement caused by the applied force?
[Ans. 6 m
3. Compare the work done and power of Pallavi and Parul when both of them can lift the same
bag of 20 Kg to a height of 50 cm in 2 and 5 seconds, respectively. (Take g =10 ms)
[Ans. Work is same; P, : = 5:2]
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Work= force *displacement ,
300 = force*5
Force =300/5
Force = 60 Newtons
300 = force*5
Force =300/5
Force = 60 Newtons
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