Question

A ball of iron of mass 10kg falls from a height of 0.8m. If the downward acceleration of the ball is 10 ms-2, calculate the momentum transfer to the floor by the ball, provided the ball does not rebound
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Answer 1

Answer:

Here, initial velocity of sphere, u=0

Distance travelled, s=80cm=0.8m

Acceleration of sphere, a=10ms

−2

Final velocity of sphere when it just reaches the ground can be calculated using

v

2

−u

2

=2as

∴v

2

−0=2×10×0.8=16

or v=

16

=4ms

−1

.

Momentum of the sphere just before it touches the ground =mv=10×4=40kgms

−1

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Answer 2

you could take any other convention.

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