Cars with a motor and breaks are traveling either up or down inclines at constant speeds, as shown below. Incline angle, car mass, and speeds are given in each figure. Rank the magnitude of the net force acting on the cart in situations (A-B). A B C D 40 cm/s 40 cm/s 20 cm/s 40 cm/s 2 kg 4 kg 4 kg 2 kg O 250 150 15 25 O A = B = C =D O B = C > A= D O A = B = D > C OD > A > B > C O None of the above