A-LevelMathematicsMechanicsMay/June 2021Paper 4 Q511 Marks
A car of mass 1250 kg is pulling a caravan of mass 800 kg along a straight road. The resistances to the motion of the car and caravan are 440 N and 280 N respectively. The car and caravan are connected by a light rigid tow-bar. (a) The car and caravan move along a horizontal part of the road at a constant speed of 30 m s⁻¹. (b) The car and caravan now travel along a part of the road inclined at sin⁻¹ 0.06 to the horizontal. The car and caravan travel up the incline at constant speed with the engine of the car working at 28 kW.
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