Sam and Dean are at a bowling alley. Sam throws a bowling ball toward a set of bowling pins, and his ball moves at 25 km/hr. Dean throws an identical ball toward another set of bowling pins, and his ball moves at 22 km/hr. Since both bowling balls have the same mass, which of the following statements is true? A. Sam's ball has more kinetic energy than Dean's ball. B. The bowling balls have the same kinetic energy. C. Dean's ball has more kinetic energy than Sam's ball. D. Neither ball has any kinetic energy.

Since both bowling balls have the same mass and Sam's ball has a higher velocity with respect to Dean's ball, it can be concluded that Sam's ball has more kinetic energy than Dean's ball (option A).

Explanation:

Kinetic energy is a term that in physics is related to a body in motion.

The conclusion about the kinetic energy of Sam and Dean's bowling balls is derived from the relationship between kinetic energy ( ) and velocity (v):

= m.v²

From this equation it can be established that the kinetic energy is directly proportional to the speed of a mobile body: higher the speed, greater the kinetic energy.

Sam's bowling ball has greater speed during its course on the bowling alley and, therefore, its kinetic energy will be greater than Dean's ball.

Learn more:

Kinetic energy link