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JEE Main202228 Jul 2022Morning ShiftPhysicsCenter of Mass, Momentum and CollisionActual

In two different experiments, an object of mass 5 kg moving with a speed of 25 ms - 1 hits two different walls and comes to rest within (i) 3 second, (ii) 5 seconds, respectively. Choose the correct option out of the following :

Options

  1. AImpulse and average force acting on the object will be same for both the cases.
  2. BImpulse will be same for both the cases but the average force will be different.
  3. CAverage force will be same for both the cases but the impulse will be different.
  4. DAverage force and impulse will be different for both the cases.

Correct answer

B. Impulse will be same for both the cases but the average force will be different.

Step-by-step solution

Impulse = Change in momentum I = Δ P Therefore, in both the cases the impulse is same. Average force is defined as, F avg   = Δ P Δ t Since the time in the two cases is different, the average force will be different.

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