To determine which of the two has higher kinetic energy, we can use the formula for kinetic energy:
KE = 0.5 * mass * velocity^2
For the car:
KE_car = 0.5 * 1000 kg * (5 m/s)^2
KE_car = 0.5 * 1000 kg * 25 m^2/s^2
KE_car = 5000 J
For the hippo:
KE_hippo = 0.5 * 1500 kg * (2 m/s)^2
KE_hippo = 0.5 * 1500 kg * 4 m^2/s^2
KE_hippo = 3000 J
Therefore, the car has a higher kinetic energy at 5000 J compared to the hippo at 3000 J. The correct answer is B) the car.
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
A)their kinetic energies are equal
B)the car
C)the hippo
D)not enough information to determine
1 answer