Question

A 30 kg child rides a 20 kg bicycle. Together, the child and the bicycle have a momentum of 110 kg-m/s. What is the velocity of the boy and the bicycle?

Answer 1

The velocity of the boy and the bicycle is 2.2 m/s.

Step-by-step explanation:

We have,

Mass of child is 30 kg and the mass of bicycle is 20 kg. The combined momentum of the child and the bicycle is 110 kg-m/s.

It is required to find the velocity of the boy and the bicycle. The momentum of an object is given in terms of mass and its velocity. So,

`p=Mv`

M is combined mass of child and bicycle

`v=(p)/(M)\\\\v=(110)/(30+20)\\\\v=2.2\ m/s`

So, the velocity of the boy and the bicycle is 2.2 m/s.