1.

A ball of mass 0.2kg is thrown normally against a wall with a speed of 20ms!It rebounds normally with a speed of 15 ms, then impulse by the ball on the wall is

Answer»

Impulse=change in momentumP2-p1=mv-(-mu)=0.2*20+0.2*15=4+3=7

7 is the right answer

7 is the right answer



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