Find the magnitude of the impulse exerted on \(B\) by \(A\), stating the units of your answer.
Find the speed of \(B\) immediately after the collision.
\item A small car, of mass 850 kg , moves on a straight horizontal road. Its engine is working at its maximum rate of 25 kW , and a constant resisting force of magnitude 900 N opposes the car's motion.
Find the acceleration of the car when it is moving with speed \(15 \mathrm {~ms} ^ { - 1 }\).
Find the maximum speed of the car on the horizontal road.
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With the engine still working at 25 kW and the non-gravitational resistance remaining at 900 N , the car now climbs a hill inclined at an angle \(\alpha\) to the horizontal, where \(\sin \alpha = \frac { 1 } { 10 }\).
Find the maximum speed of the car on this hill.
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