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3. Two billiard balls of mass 50 g moving in opposite directions with speed of 16 ms -1 collide andrebound with the same speed. What is the impulseimparted by each ball to the other ?11 |
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Answer» n :Two billiard balls of mass 50G moving in opposite directions with speed of 16 m/s collide and REBOUND with same speed . What is the impulse imparted by each ball on one other.Given :Mass of two balls = 50 gVelocity of two balls = 16 m/sTo find :The impulse imparted by the two balls.Solution :First let us convert the mass from g to kg.Since, we know that :1 g = 1000 kg.50 g = (50/1000) kg==> 50 g = 0.05 kgHence, the mass of the ball in kg is 0.05 kg.We know the FORMULA for Impulse,i.e,[Note :- Impulse is equal to the rate of CHANGE of momentum]Where :-m = Mass of the bodyv = Final Velocityu = Initial VelocityHere :-m = 0.05 kgv = 16 m/su = (-16) m/s[Note : The initial velocity will be taken as negative coz the body is moving in a opposite direction]Now , using the above formula and substituting the values in it, we GET :Hence, the impulse imparted by the two bodies is 1.6 kg m/s. |
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