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7. A 100 g iron ball having velocity 10 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

(a) 10 N (b) 100 N

(c) 1.0 N (d) 0.1 N

answer : a

(7)

5/5 - (1 vote)

PrevPrevious6. If a force of 250 N act on body, the momentum acquired is 125 kg-m/s. What is the period for which force acts on the body

Next23. The planes of two rigid discs are perpendicular to each other. They are rotating about their axes. If their angular velocities are 3 rad/sec and 4 rad/sec respectively, then the resultant angular velocity of the system would beNext

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