Calculate the speed of a 500.0 kilogram car that possesses 400,000 joules of kinetic energy.

40m/s

Explanation:

Given that,

speed of car (v) = ?

Mass of car (m) = 500.0 kilogram

Kinetic energy (KE) = 400,000 joules

Recall that kinetic energy is possessed by a moving object, and it depends on the mass and speed by which the object moves

i.e Kinetic energy = 1/2mv²

400,000J = 1/2 x 500.0kg x v²

400,000J = 250.0kg x v²

v² = 400,000J / 250.0kg

v² = 1600

Find the square root of v²

v = √1600

v = 40m/s

Thus, the speed of the car is 40m/s