2 A tractor of mass 3700 kg is travelling along a straight horizontal road at a constant speed of \(12 \mathrm {~m} \mathrm {~s} ^ { - 1 }\). The total resistance to motion is 1150 N .
- Find the power output of the tractor's engine.
The tractor comes to a hill inclined at \(4 ^ { \circ }\) above the horizontal. The power output is increased to 25 kW and the resistance to motion is unchanged. - Find the deceleration of the tractor at the instant it begins to climb the hill.
- Find the constant speed that the tractor could maintain on the hill when working at this power.