A lightweight electric car is powered by ten 12 V batteries. At aspeed of 75 km/

Question

A lightweight electric car is powered by ten 12 V batteries. At aspeed of 75 km/h, the averagefrictional force is 1100 N. (a) What must be the power of the electricmotor if the car is to travel at a speed of 75 km/h?
1 kW

(b) If each battery can deliver a total charge of 140 A·h before recharging, what is thetotal charge in coulombs that can be delivered by the 10 batteriesbefore charging?
2 C

(c) What is the total electrical energy delivered by the 10batteries before recharging?
3 J

(d) How far can the car travel at 75km/h before the batteries must be recharged?
4 km

(e) What is the cost per kilometer if the cost of recharging thebatteries is 9 cents per kilowatt-hour?
5 cents/km (a) What must be the power of the electricmotor if the car is to travel at a speed of 75 km/h?
1 kW

(b) If each battery can deliver a total charge of 140 A·h before recharging, what is thetotal charge in coulombs that can be delivered by the 10 batteriesbefore charging?
2 C

(c) What is the total electrical energy delivered by the 10batteries before recharging?
3 J

(d) How far can the car travel at 75km/h before the batteries must be recharged?
4 km

(e) What is the cost per kilometer if the cost of recharging thebatteries is 9 cents per kilowatt-hour?
5 cents/km

Explanation / Answer

HEY ! I'm sorry the answer is 2.75 ! I missed out a zero.

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