9709 P43 - Jun 2015 - Q3
3449
A car of mass 860 kg travels along a straight horizontal road. The power provided by the car’s engine is \(P\) W and the resistance to the car’s motion is \(R\) N. The car passes through one point with speed 4.5 m s\(^{-1}\) and acceleration 4 m s\(^{-2}\). The car passes through another point with speed 22.5 m s\(^{-1}\) and acceleration 0.3 m s\(^{-2}\). Find the values of \(P\) and \(R\).
