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Physics · LAWS OF MOTION
हिन्दीTwo identical balls strike a rigid wall with the same speed \( u \). Ball A hits normally, while Ball B hits at an angle of \( 30^\circ \) with the normal and reflects at the same angle without change in speed. The ratio of the magnitudes of impulse imparted to Ball A and Ball B is:
Correct answer · Option 1
\( 2 : \sqrt{3} \)
Explanation
Impulse for normal collision \( I_A = 2mu \). Impulse for collision at \( 30^\circ \) with normal \( I_B = 2mu \cos 30^\circ = \sqrt{3}mu \). Ratio \( I_A/I_B = 2mu / (\sqrt{3}mu) = 2/\sqrt{3} \).
