A mass of 4.0kg, moving horizontally at 2.5m s−1, is acted on by a force for 5.0s, which brings the mass to a stop. Use the SUVAT equations to answer the following.
(1) What was the change in velocity of the mass?
(2) What was the acceleration of the mass?
(3) Calculate the size of the force that acted on the mass.
(4) How does your answer show the direction of the force?