When its engine supplies a force of 506 kg-wt, a car of mass 912 kg moves with constant velocity up a hill of inclination . If the total resistance to the car’s motion is of its weight, what is the angle of inclination, ? Give your answer to the nearest minute.
A car of mass tons was initially at rest on a hill inclined at an angle to the horizontal, where . After 100 seconds, its velocity was 21 m/s. Calculate the resistance per ton of the car’s mass. Take .