Question

Which of the following has a higher kinetic energy?

A 1000 kg car rolling at a speed of 5 m/s across the floor or a 1500 kg hippo swimming at a speed of 2 m/s


the hippo

their kinetic energies are equal

not enough information to determine

the car

Answer 1

To solve the problem, we need to use the formula for kinetic energy:

KE = (1/2) * mass * velocity^2

For the car:

KE = (1/2) * 1000 kg * (5 m/s)^2 = 12,500 J

For the hippo:

KE = (1/2) * 1500 kg * (2 m/s)^2 = 3000 J

Therefore, the car has a higher kinetic energy:

Answer: The car.