Physics question

Question

If a car's velocity speed changes from 30 m/s to 60 m/s, how does this affect the Kinetic Energy.

Answer 1

Let's look at the Kinetic Energy equation:

KE = 1/2mv²

In this equation, notice that the velocity, or speed, is squared. Therefore, because the speed of the car , doubled as it accelerated from 30 m/s to 60 m/s, this value will be squared. Therefore, the Kinetic Energy of the car's speed at the final time will be quadrupled in comparison to the car's initial speed.