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JIPMER 2004
Exam
JIPMER
Year
2004
Subject
Physics
Chapter
Center of Mass, Momentum and Collision

JIPMER 2004 · Physics · Center of Mass, Momentum and Collision

A ball of mass 10 g moving with acceleration of 20 ~m / s^2 is hit...

A ball of mass 10 g moving with acceleration of 20 m/s220 \mathrm{~m} / \mathrm{s}^2 is hit by a force which acts on it for 0.1 sec . The impulsive force is

Options

  1. A1.2 Ns
  2. B0.3 Ns
  3. C0.1 Ns
  4. D0.5 Ns

Correct answer

B. 0.3 Ns

Step-by-step solution

Here: Mass of the ball m=150gm=150 \mathrm{ g}time =0.15kg&Acceleration of the ball =20m/s2&dt=0.1s\begin{aligned}& \text{time }=0.15 \mathrm{ kg} \& \text{Acceleration of the ball }=20 \mathrm{ m} / \mathrm{s}^2 \& \mathrm{dt} =0.1 \mathrm{ s}\end{aligned}$Force,Force,\quad F=m a=0.15 \times 20=3 \mathrm{ N} Now impulsive force =F×dt=3×0.1=0.3=F \times d t=3 \times 0.1=0.3\mathrm{Ns}$
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