InterviewSolution
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InterviewSolution
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Two billiard balls A and B each of mass 50 g and moving in opposite directions with speed of `5 m//s` each, collide and rebound with the same speed if the collision lasts for `10^(-3)` s which of the following statement(s) is (are) true?A. The impulse imparted to each ball is `0.25 kg- ms^(-1)` and the force on each ball is 250 NB. The impulse imparted to each ball is `0.25 kg-ms^(-1)` and the force exerted on each ball is `25 xx 10^(-5) `NC. The impulse imparted to each ball is `0.5` N-sD. The impluse and the force on each ball are equal in magnitude and opposite directions |
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Answer» Correct Answer - C::D Given `" " m_(1) = m_(2) 50(g) = (50)/(1000) kg = (1)/(20) kg ` Initial velocity (u) = `u_(1) = u_(2) = 5m//s` Final velocity (v) = `v_(1) = v_(2) =- 5 m//s` Time duration of collision = `10^(-3) s ` Change in linear momentum = m (v-u) = `(1)/(20) [-5-5] = - 0.5 N-s`. Force = `("Impulse")/("Time") = ("Change in momentum")/(10^(-3) s)` = `(0.5)/(10^(-3)) = 500 N` Impulsive and force are opposite in directions. |
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