A 20-kg bicycle carrying a 50-kg girl is traveling at a speed of 8 m/s. What is the kinetic energy of the girl

and bicycle?

The answer to your question is Ke = 2240 J

Explanation:

Data

mass of the object = 20 kg

mass of the girl = 50 kg

speed = 8 m/s

Kinetic energy = Ke = ?

Formula

Ke = 1/2 mv²

Process

Kinetic energy is due to the movement of an object.

1. - Calculate the total mass

Total mass = 20 + 50 = 70 kg

2. - Substitution

Ke = 1/2 (70) (8) ²

3. - Simplification

Ke = 1/2 (4480)

4. - Result

Ke = 2240 J