Question

Calculate the change in momentum of a 0.5 kg ball that strikes the floor a 15 m/s and bounces back up at 12 m/s

Answer 1

Answer:

13.5 kg. m/s

Explanation:

According to the given question,

m = mass = 0.5 kg

v1 = initial velocity = 15 m/s

v2 = final velocity = 12 m/s

p = change in momentum

And we are asked to find the change in momentum.

We know,

• p = m(v2 - v1)

As here v1 is opposite to the direction of v2 thus, taking one of the direction as positive i.e, v2 as positive hence v1 is negative.

Putting the values we get,

• p = 0.5 × (12 - (-15))

• p = 0.5 × (12+15)

• p = 0.5 × 27

• p = 13.5 kg. m/s

Therefore, momentum of the ball is 13.5 kg. m/s.

Answer 2

Hey there

refer to attachment