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A force of 10 N is applied to a stationa...

A force of 10 N is applied to a stationary mass of 25 kg. The work done in the 1st second is given by

A

10J

B

2J

C

25J

D

2.6J

Text Solution

Verified by Experts

The correct Answer is:
B
As `F = ma`
`implies 10 = 25 a therefore a = 10//25 = 2//5`
Now
`s = ut + 1/2 at^2 implies s = 0 + 1/2 xx 2/5 xx t^2 = 1/5`
Now, `W = F . s = 10 1/5 = 2J`
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