Question

A person is riding a bike at 5 m/s due west. the mass of the rider + bike is 95 kg. what is the magnitude of its momentum?

Answer 1

the magnitude of the momentum is given by
p=mv
=95*5
=475kgm/s

Answer 2

The momentum of an object is given by

`p=mv`
where m is the object's mass and v its velocity.

In this problem, the mass of the system rider+bike is m=95 kg, while its speed is v=5 m/s. Therefore, the magnitude of the momentum is

`p=mv=(95 kg)(5 m/s)=475 kg m/s`