P = Fv1f1= p/v1= 60000w/4m/s =15000nf = 0.1mg = 5000n.
F1-f = ma1a1= (15000-5000)/5000 = 2m/S2.
(2) When the acceleration of the car is A2 = 1m/s 2, find the speed v2 of the car.
By F2-f=ma2 F2= 10000N.
V2=P/F2=4m/s
(3) Find the maximum speed vm that the car can reach.
p = FV = FVM VM = p/f = 60000/5000 = 12m/s