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A 100 g iron ball having velocity l0 m/s collides with a wall at an angle 30° and rebounds with the same angle. If the period of contact between the ball and wall is 0.1 second, then the force experienced by the wall is

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a

10N

b

l00N

c

1.0 N

d

0.1 N

answer is A.

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Detailed Solution

During collision of ball with the wall horizontal momentum changes (vertical momentum remains constant)∴ F = Change in horizontal momentumTime of contact= 2P cos θ0.1 = 2mv cos θ0.1= 2×0.1×10×cos 6000.1 = 10 N

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