The answer is (d) the hippo.
Kinetic energy is calculated using the formula KE = 1/2mv^2, where m is the mass of the object and v is its velocity.
Plugging in the values for the car:
KE = 1/2 * 1000 kg * (5 m/s)^2 = 12,500 J
Plugging in the values for the hippo:
KE = 1/2 * 1500 kg * (2 m/s)^2 = 3000 J
Therefore, the hippo has a lower mass but is traveling at a higher velocity, resulting in a higher kinetic energy than 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
not enough information to determine
b
the car
c
their kinetic energies are equal
d
the hippo
1 answer
1 answer