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.

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)

f=ma newton

f=100x2.5=250n

radiation

explanation:

heat is transmitted by radiation