A force of 6 N acts on a body at rest and of mass 1 kg . During this time, body attains a velocity o

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4-1.Newton's Laws of Motion

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A force of $6\; N$ acts on a body at rest and of mass $1\; kg$. During this time, the body attains a velocity of $30\; m / s$. The time for which the force acts on the body is ..... $seconds$

A

$5$

B

$7$

C

$8$

D

$10$

(AIPMT-1997)

Solution

$a=\frac{F}{m}=\frac{6}{1}=6 m / s ^{2}$

$v=u+a t$

$30=0+6 \times t$

$t=5$ seconds.

Standard 11

Physics

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