A 1000kg car is initially driving at 20m/s on a flat street. The car then speeds up to 35m/s. What is the total change in kinetic energy of the car?

Kinetic energy:
Energy that a body has when it is in motion.
Kinetic energy KE = \frac{1}{2} mv^2 . where, m - mass of the body and v - body velocity.
The kinetic energy formula is used to measure the body's mass, velocity, or kinetic energy if any of the other two numerics is given.
Step 1: Finding the kinetic energy of the car.
Given that
Mass of the car, m = 1000 kg
Initial speed of the car, v_0=20m/s
Final speed of the car, v\ =\ 35\ m/s
Initial kinetic energy KE_i=\frac{1}{2}mv_0^2
KE_i = \frac{1}{2} (1000kg) (20m/s)^2
KE_i = 500 * 400
KE_i = 200000 joules
Final kinetic energy KE_f = \frac{1}{2} mv^2
KE_f = \frac{1}{2} (1000kg)(35m/s)^2
KE_f = 500 * 1225
KE_f = 612500 joules
Step 2: Finding the total change in kinetic energy of the car
Change in kinetic energy \Delta KE = KE_f - KE_i
\Delta KE = 612500 - 200000
\Delta KE = 412500
Hence, change in kinetic energy \Delta KE = 412500