Q12 of 21 Page 109

If a fly collides with the windshield of the fast moving bus. Is the impact force experienced same for fly and bus? Why?

Is the same acceleration experienced by a fly and the bus? Why?

According to Newton’s third law of motion we know

‘To every action, there is an equal and opposite reaction.’


Hence the impact force experienced by the fly and the bus are the same but in the opposite direction


Now, let


M = mass of the bus


m = mass of fly


M>m


But force acting on both is same


Force = F = mass × acceleration


Let, a1 = acceleration of fly


a2 = acceleration of bus


Force on fly = F1 = ma1


Force on bus = F2 = Ma2



Since,





Since M>m


So, a1>a2


Hence acceleration of fly is more than the acceleration of bus.


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