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32 A 12 V car battery is found to be capable of storing 2.0 kW h of electrical energy. For a certainelectric car, it is necessary to develop 10 kW of power to drive at 20 km/h.(a) Suppose that the car has 10 such batteries. How long (in hours) could it run if all 10 of thenmreleased all of their energy?(b) How far (in kilometres) can the car go on its 10 batteries if they are fullycharged?

Answer»

(a) total energy stored in car = 10*2KWH = 20KWH

Car takes 2 KW for 20km/h.

So, t = 20KWH/ 2KW = 10 Hours

(b) Total distance covered = v *t = 20*10 = 200 km.



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