A body of mass 5kg is thrown vertically up with velocity 20 $m s^{- 1}$ . What will be its momentum just before hitting the ground? Take upward direction as positive.

100 Kg m/s

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0 Kg m/s

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-100 Kg m/s

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-20 Kg m/s

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Solution

The correct option is C -100 Kg m/s
Given mass m = 5 kg and initial velocity v = 20 $m s^{- 1}$

The velocity of the ball just before hitting the ground will be equal to the initial velocity of the ball but in downwards direction.
So, Linear momentum p = $m \times v$
p = 5 x (-20) = -100 $k g m s^{- 1}$

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A body of mass 5kg is thrown vertically up with velocity 20ms−1. What will be its momentum just before hitting the ground? Take upward direction as positive.

The correct option is C -100 Kg m/sGiven mass m = 5 kg and initial velocity v = 20ms−1 The velocity of the ball just before hitting the ground will be equal to the initial velocity of the ball but in downwards direction. So, Linear momentum p = m×v p = 5 x (-20) = -100 kgms−1

A body of mass 5kg is thrown vertically up with velocity 20 $m s^{- 1}$ . What will be its momentum just before hitting the ground? Take upward direction as positive.