1 A car of mass 1150 kg travels up a straight hill inclined at \(1.2 ^ { \circ }\) to the horizontal. The resistance to motion of the car is 975 N . Find the acceleration of the car at an instant when it is moving with speed \(16 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) and the engine is working at a power of 35 kW .