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 (a) 7 seconds (b) 5 seconds (c) 10 seconds (d) 8 seconds

Answer: (b). a = F/m = 6/1 = 6 m/s² v = u + at ⇒ 30 = 0 + 6t ⇒ t = 5 s So the answer is (b) 5 seconds.

A force of 6 N acts on a body at rest and of mass 1 kg. During this… | NEET 1997 (AIPMT)

Q41NEET 1997 · AIPMTEasy

Inertia, First & Second Laws

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

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Answer: (b)

$a = \frac{F}{m} = \frac{6}{1} = 6\text{ m/s}^2$
$v = u + at \Rightarrow 30 = 0 + 6t \Rightarrow t = 5\text{ s}$
So the answer is (b) 5 seconds.

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