A body of mass 5 $k g$ is moving with a velocity 20 $m / s .$ If a force of 100 $N$ is applied to it for 10 s in the same direction as its velocity, what will be the velocity of the body?

180 m / s

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200 m / s

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220 m / s

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250 m / s

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Solution

The correct option is C $220 m / s$
Given,
$m = 5 k g$
$u = 20 m / s$
$F = 100 N$
$t = 10 s$
Force, $F = m a$
$a = \frac{F}{m}$
$a = \frac{100}{5} m / s^{2}$
$a = 20 m / s^{2}$
From 1st equation of motion,
$v = u + a t$
$v = 20 + 20 \times 10$
$v = 20 + 200$
$v = 220 m / s$
The correct option is C.

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A body of mass 5kg is moving with a velocity 20m/s. If a force of 100N is applied to it for 10 s in the same direction as its velocity, what will be the velocity of the body?

The correct option is C 220m/sGiven,m=5kgu=20m/sF=100Nt=10sForce, F=maa=Fma=1005m/s2a=20m/s2From 1st equation of motion,v=u+atv=20+20×10v=20+200v=220m/sThe correct option is C.

A body of mass 5 $k g$ is moving with a velocity 20 $m / s .$ If a force of 100 $N$ is applied to it for 10 s in the same direction as its velocity, what will be the velocity of the body?

The correct option is C $220 m / s$
Given,
$m = 5 k g$
$u = 20 m / s$
$F = 100 N$
$t = 10 s$
Force, $F = m a$
$a = \frac{F}{m}$
$a = \frac{100}{5} m / s^{2}$
$a = 20 m / s^{2}$
From 1st equation of motion,
$v = u + a t$
$v = 20 + 20 \times 10$
$v = 20 + 200$
$v = 220 m / s$
The correct option is C.