A body of man 100 kg travelled 10 m before coming to rest. If m = 0.4, work done against friction is (motion is happening on horizontal surface, take g=10 m/s2)
A body of man 100 kg travelled 10 m before coming to rest. If m = 0.4, work done against friction is (motion is happening on horizontal surface, take g=10 m/s2)
Option 1 -
4500 J
Option 2 -
5000 J
Option 3 -
4200 J
Option 4 -
4000 J
Asked by Shiksha User
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1 Answer
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Correct Option - 4
Detailed Solution:v2 = 2 × mgs
v2 = 2 × (0.4) × 10 × 10
v2 = 80
Wf = Dk
=
Wf = – 4000
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