A student releases a ball with mass of 2 kg from a height of 5 m from the ground. What would be the momentum of the ball just before it hits the ground?

**Answer:**

In order to find the momentum, we need to know the mass and the velocity of the ball right before it hits the ground.

It's given that the mass, m = 2kg.

The velocity is not given directly. However, we can determine the velocity, v, by using the linear equation of uniform acceleration.

This is a free falling motion,

The initial velocity, u = 0

The acceleration, a = gravirational acceleration, g = 10ms-2

The dispacement, s = high = 50m.

The final velocity = ?

From the equation

v2 = u2 + 2as

v2 = (0)2 + 2(10)(5)

v = 10ms-1

The momentum,

p = mv =(2)(10) = 20 kgms

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