How does a car's kinetic energy change when it speeds up from 10 to 20 m/s? a. It quadruples. b. It stays the same. c. It doubles. d. It triples.

Answer: It quadruples (a)

Explanation:

Kinetic energy is energy due to virtue of motion of a body. For a body in motion, it must possesses velocity.

Kinetic energy = 1/2MV²

M is mass of the body

V is the velocity

If the initial velocity of the body is 10m/s

K. E = 1/2 * 100M1 ... 1

K. E = 50M1

For the velocity of the body @ 20m/s

K. E = 1/2 * 400M2 ... 2

K. E = 200M2

Equating the values of both KE in 1 and 2 we have;

50M1 = 200M2

M1 = 4M2

M1/M2 = 4

This shows that the car's kinetic energy quadruples) a)