A body of mass 2kg is at rest. What should be the magnitude of force which will make the body move with a speed of 30m/s at the end of 1s?
A
30N
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B
15N
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C
60N
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D
40N
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Solution
The correct option is C60N m=2kg v=30m/s t=1s
Let the force aplied is F newton
The acceleration produced due to this force is :- a=Fm=F2
Initially the body is at rest. so, u=0
Applying, v=u+at, we have 30=0+F2×1 ⇒F=60N