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NEET PHYSICSEasy

A ball of mass 150 g starts moving with an acceleration of 20 m/s² when hit by a force, which acts on it for 0.1 s. The impulsive force is:

A

0.5 N s

B

0.1 N s

C

0.3 N s

D

1.2 N s

Step-by-Step Solution

  1. Identify Given Values:
  • Mass (mm) = 150 g = 0.15 kg
  • Acceleration (aa) = 20 m/s220 \text{ m/s}^2
  • Time duration (tt) = 0.1 s
  1. Calculate Force: According to Newton's Second Law, the force acting on the ball is: F=ma=0.15 kg×20 m/s2=3.0 NF = ma = 0.15 \text{ kg} \times 20 \text{ m/s}^2 = 3.0 \text{ N} [Source 75]
  2. Calculate Impulse: The question asks for the 'impulsive force' but provides options in units of Impulse (N s). Impulse is defined as the product of force and the time duration for which it acts (or simply the change in momentum). Impulse=F×t\text{Impulse} = F \times t Impulse=3.0 N×0.1 s=0.3 N s\text{Impulse} = 3.0 \text{ N} \times 0.1 \text{ s} = 0.3 \text{ N s} [Source 66, 76]
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