A 60-kg cheetah reaches a speed of 30m\s as it chases its prey. What is the kinetic energy of the cheetah?
A 900 J
B 1,800 J
C 27,000 J
D 54,000 J
MY answer is B
The answer is C.
Kinetic energy = 1/2 mass * velocity squared.
27,000 = 30kg * 30m/s * 30 m/s.
To calculate the kinetic energy (KE) of an object, you need to use the formula:
KE = (1/2) * mass * velocity^2
In this case, the mass of the cheetah is given as 60 kg, and the velocity is given as 30 m/s. Let's substitute these values into the formula:
KE = (1/2) * 60 kg * (30 m/s)^2
= 0.5 * 60 kg * 900 m^2/s^2
= 27,000 J
Therefore, the correct answer is C, 27,000 J.