Question

A ball of mass 3 kg moving with a speed of 100m/s srikes a wall at an angle 60degree the balk reboubds at the same speed and remains in contact with the wall for 0.2 sec the force exerted by the wall on the wall is

Answer 1

Answer:

Initial momentum = (-m×u×cosA) î + (m×u×sinA) j

Final momentum = (m×u×cosA) î + (m×u×sinA) j

Change in momentum = Final Momentum- Initial momentum

= -2mucosA

Here, A is 60×60 = 120°

F = Change in momentum/Time

F = 2×3×100×cos120° / 0.2

F = -300/0.2

F = - 1500 N

Answer 2

Explanation:

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