PEARSON (PEARSON) • Further Mechanics 1
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A van of mass 900 kg is moving along a straight horizontal road. At the instant when the speed of the van is v m s−1, the resistance to the motion of the van is modelled as a force of magnitude (500 + 7v) N. When the engine of the van is working at a constant rate of 18 kW, the van is moving along the road at a constant speed V m s−1 (a) Find the value of V. (5) Later on, the van is moving up a straight road that is inclined to the horizontal at an 1 angle θ , where sin...