14) A car of weight W has maximum power H. In all circumstances there is a constant resistance R due to friction. When the car is moving up a slope of 1 in n (arcsin A) its maximum speed is v and when it is moving down the same slope it maximum speed is 2v. Find R in terms of W and n. The maximum speed of the car on level road is u. Find the maximum acceleration of the car when it is moving with speed u up the given slope. (A.E.B.)