OnlineCBT
Physics · LAWS OF MOTION
हिन्दीA rubber ball of mass \( 0.25 \text{ kg} \) strikes a vertical rigid wall horizontally with a speed of \( 10 \text{ m s}^{-1} \) and rebounds along the same path with the same speed. The magnitude of impulse delivered by the wall to the ball is:
Correct answer · Option 1
\( 5 \text{ N s} \)
Explanation
Impulse \( = \Delta p = m v_f - m v_i = m(-10) - m(10) = -2mv = -2(0.25)(10) = -5 \text{ N s} \). Magnitude is \( 5 \text{ N s} \).
