A body of mass 2 ,kg is moving with a velocity 8, m/s on a smooth surface. If it is to be brought to

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4-1.Newton's Laws of Motion

easy

A body of mass $ 2 \,kg$ is moving with a velocity $8\, m/s$ on a smooth surface. If it is to be brought to rest in $4 \,seconds$, then the force to be applied is ......... $N$

A

$8$

B

$4$

C

$2 $

D

$1 $

Solution

(b)$F = ma = \frac{{m(u – v)}}{t} = \frac{{2 \times (8 – 0)}}{4} = 4N$

Standard 11

Physics

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