Asports car moving at constant velocity travels 120 m in 5.0 s. if it then brakes and comes to a stop in 4.0 s, what is the magnitude of its acceleration assumed constant in m/s^2 and in g's g = 9.80 m/s^2

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.