One person raises a 100 lb. box 5 ft. to load on a truck. another person loads a similar box in half the time. which statements are correct? both men did equal work. the first person did more work. the second person did more work. the second person worked faster.

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.