Question

7. A boy on ice skates has a momentum of 200 kg m/s to the left at a velocity of 20

m/s. How fast is the boy going?

Answer 1

Answer: 10 m/s

Explanation:

Given

Momentum of boy
`P=200\ kg.m/s`

Mass of boy is
`m=20\ kg`

Momentum is the product of mass and velocity

`P=mv`

Substitute value

`\Rightarrow 200=20* v\\\Rightarrow v=10\ m/s`

Thus, the boy is moving with a velocity of 10 m/s