Question

A ball is thrown vertically upwards. What is its
momentum at the highest point?
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Answer 1

Answer:

When a stone is thrown upwards, it has a velocity which is opposite to the acceleration of gravity. This means that the stone will slow down as it gets higher. So, it's easy to see that the stone will have no velocity at its highest point.

that means, v = 0

Because the stone must stop before falling down.

as we all know,

Momentum is measured as a product of mass and velocity.

p = mv

So, If the velocity is zero, the momentum of the object is zero. So even though the stone has mass, it has no momentum at its highest point.

then p = 0.

Answer 2

fact: at highest point of an object, it has zero velocity.

read the above fact☝.

now, what is momentum?

you are right, momentum= m x v.

when velocity is zero, the equation will become like,

momentum= 0m= 0

SO, MOMENTUM IS ZERO