A1400 kg wrecking ball hangs from a 12-m-long cable. the ball is pulled back until the cable makes an angle of 28.0 ∘ with the vertical.

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system