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Standard X

Physics

Work Done by Force of Gravity

A body of mas...

Question

A body of mass 5 kg is thrown vertically up with velocity 20 $\frac{m}{s}$ . 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
The velocity of ball just before hitting the ground will be equal to the initial velocity of ball but in downwards direction.
So, p = mv
P = 5 x (-20) = -100 kg m/s

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

The correct option is C -100 Kg m/sThe velocity of ball just before hitting the ground will be equal to the initial velocity of ball but in downwards direction. So, p = mv P = 5 x (-20) = -100 kg m/s

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

The correct option is C -100 Kg m/s
The velocity of ball just before hitting the ground will be equal to the initial velocity of ball but in downwards direction.
So, p = mv
P = 5 x (-20) = -100 kg m/s