A) is increased by 4 times
B) is increased by 16 times
C) is increased by 8 times
D) remains unchanged
Correct Answer: B
Solution :
[b] The work done = force \[\times \] displacement \[\therefore \] unit, \[{{u}_{1}}=Fs\]and \[{{u}_{2}}=4F\times 4s=16u.\]
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