Does kinetic energy of car change more it it goes from 10-20mph or 20-30mph or is it the same?

Answer 1

The formula for kinetic energy is:

K.E. = 1/2 m V2 (m is mass and V2 is velocity squared)

If you calculate K.E. for both velocities and subtract you will have the difference and your answer.

Answer 2

It increases more from 20-30mph because kinetic energy is proportional to velocity SQUARED.

Kinetic energy = 1/2 the mass of an object times its velocity squared.

20 squared - 10 squared = 300 (400-100)
30 squared - 20 squared = 500 (900-400)

Answer 3

The kinetic energy of an object is proportional to the velocity squared.
So the change from ten to twenty is:
Change in Energy = m/2(400 - 100) = 150*m

The change from twenty to thirty is:
Change in Energy = m/2(900 - 400) = 250*m

As can be seen, there is a greater energy change in the second change.

Answer 4

The faster something moves, the more momentum it has. It's mass actually increases as it goes faster, however, this is nearly imperceptible unless you are travelling near light speed. So, the answer is yes, it has more kinetic energy.