Question

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?

Answer 1

2.24kJ

Step-by-step explanation:

Kinetic energy is the energy that a object possesses due to its motion.

Let kinetic Energy (KE),

Here both the Bicycle and the girl is travelling at the given speed , therefore we have to consider the total mass

according ti the definition ,

`KE=(1)/(2)*mass*velocity^(2)  \\=(1)/(2)*(50+20)kg*(8ms^(-1) )^(2)\\  =2240J\\=2.24kJ`