(i(a))[2]
The car travels in a straight line along a horizontal road at a steady speed of $40\,\text{m s}^{-1}$. Calculate, in $\text{kW}$, the power output of the car engine.
(i(b))[3]
If this power is then reduced suddenly by $22\,\text{kW}$, find the instantaneous deceleration of the car.
(ii)[3]
The car is now moving at a constant speed up a straight road that is inclined at $8^\circ$ to the horizontal, with the engine operating at $80\,\text{kW}$. If the resistance force is unchanged, find this constant speed.