The thermal energy of a system consisting of a thrown ball, Earth, and the air is most closely associated with:
A)the gravitational interaction of the Earth and the ball
B)the kinetic energy of the ball as a whole
C)motions of the individual particles within the ball
D)motions of individual particles within the ball and the air
E)the kinetic energy of Earth as a whole

Question

Quizplus · Accepted Answer

The thermal energy of a system is associated with the motions of the individual particles within the system. In this case, the system consists of the ball, Earth, and air, so the thermal energy is most closely associated with the motions of the individual particles within the ball and the air. Choice A is incorrect, as the gravitational interaction between the Earth and the ball is a potential energy, not a thermal energy. Choice B is incorrect, as the kinetic energy of the ball as a whole is a different form of energy than thermal energy. Choice C is incorrect, as the motions of individual particles within the ball are only a part of the overall thermal energy of the system. Choice E is incorrect, as the kinetic energy of Earth as a whole is also a different form of energy than thermal energy.

The Thermal Energy of a System Consisting of a Thrown