If a ball is thrown in the air starting at position a (fromthe
ground) with an initial velocity of 80 m/s and given thatthe time
it takes to travel to point b is t=3s, what is thetime,
displacement and velocity at positions b (half way up in theair), c
(at max height) and d (back on ground).

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.