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Physics · LAWS OF MOTION

हिन्दी

Refer to the given figure showing two collisions of a ball with a wall. In case (b), the angle made by the path of the ball with the normal is \( 30^\circ \). What is the y-component of the impulse delivered to the ball in case (b)?

  1. \( 0 \)
  2. \( -2 m u \sin 30^\circ \)
  3. \( m u \cos 30^\circ \)
  4. \( -2 m u \cos 30^\circ \)

Correct answer · Option 1

\( 0 \)

Explanation

Initial y-momentum is \( -mu \sin 30^\circ \) and final y-momentum is \( -mu \sin 30^\circ \). The change in y-component of momentum is zero, hence y-component of impulse is 0.
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