Question

A 920-kg compact car moving at 92 m/s has approximately 3,893,440 Joules of kinetic energy. What is the change in kinetic energy if it is moving at 36 m/s?

Answer 1

Change in kinetic energy = 3297280 J

Step-by-step explanation:

Given that,

Mass, m = 920 kg

Speed of a car, v = 92 m/s

Kinetic energy, K = 3,893,440 J

If the speed of a car, V = 36 m/s

Net kinetic energy is given by :

`K_n=(1)/(2)mV^2\\\\=(1)/(2)* 920* (36)^2\\\\K_n=596160\ J`

The change in kinetic energy = 3,893,440 - 596160

= 3297280 J

So, the change in kinetic energy of the car is 3297280 J.