When a golf ball is hit, it travels at 39 meters per second. The mass of a golf ball is 0.045 kg. What is the kinetic energy of the golf ball?
a. 75.64 J
b. 34.22 J
c. 0.922 J
d. 68.44 J
To calculate the kinetic energy of the golf ball, we use the formula:
Kinetic Energy = 0.5 * mass * velocity^2
Plugging in the values:
Kinetic Energy = 0.5 * 0.045 kg * (39 m/s)^2
Kinetic Energy = 0.5 * 0.045 kg * 1521 m^2/s^2
Kinetic Energy = 34.22 J
Therefore, the correct answer is b. 34.22 J.