Question

Rita is riding a 7.0 kilogram bike at a velocity of 15 meters/second. Rita’s mass is 42 kilograms. What is her momentum?

Answer 1

Momentum = mass (kg) * velocity (m/s)

Total mass = mass of bike + mass of Rita = 7 + 42 = 49 Kg

Momentum = 49 * 15 = 735 = 7.35 * 10^2 = 7.4 * 10^2 to one decimal place

Final answer is 7.4 × 102 kilogram m/s

Answer 2

Momentum, p = 735 kg-m/s

Step-by-step explanation:

It is given that,

Mass of the bike, m = 7 kg

Speed of the bike, v = 15 m/s

Mass of Rita, m' = 42 kg

The expression for the momentum of an object is given by :

p = mv

Here, m is the total mass of bike and Rita

`p=(m+m')v`

`p=(7+42)\ kg* 15\ m/s`

p = 735 kg-m/s

So, her momentum is 735 kg-m/s. Hence, this is the required solution.