Question

Two balls of masses 2kg and 1kg are dropped from the same height. What is the ratio of momentum when they are just to hit the ground? ( Take g=ms^-2)

Answer 1

Answer:

the acceleration of both the objects will be the same ( under ideal conditions), since the acceleration (caused by gravity) faced both is the same.

Since acceleration is the same, the rate of change of velocity of both is the same, hence they cover equal distances in equal intervals of time. Therefore, they hit the ground at the same time.

However, the force with which they strike the ground is different, since

F = mass * g. Ensure that you don’t confuse the force experienced by them, to the velocity with which they fall.

Bottomline: They fall with same velocity, hit the ground at the same time ; but exert different force.

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