During a lightning flash, there exist a potential differenceof Vcloud- Vground =

Question

During a lightning flash, there exist a potential differenceof Vcloud- Vground =1.2 x ten to the 9thV between a cloud and the ground. As a result, a charge of -25Cis transferred from the ground to the cloud.(a). How much workWground- cloud is done on the charge by the electric force? (b).Ifthe work done by the electric force were used to accelerate a1100-kg automobile from rest, what would be its final speed? (c).If the work done by the electric force were converted into heat,how many kilograms of water at 0 degree C could be heated to 100degree C. I need b and c During a lightning flash, there exist a potential differenceof Vcloud- Vground =1.2 x ten to the 9thV between a cloud and the ground. As a result, a charge of -25Cis transferred from the ground to the cloud.(a). How much workWground- cloud is done on the charge by the electric force? (b).Ifthe work done by the electric force were used to accelerate a1100-kg automobile from rest, what would be its final speed? (c).If the work done by the electric force were converted into heat,how many kilograms of water at 0 degree C could be heated to 100degree C. I need b and c

Explanation / Answer

a) W = qV = - 25 * 1.2 x 109 = 3.0 x1010 J b) W = KE = 0.5mv2 = qV       ==> v = 2W/m                = 2 * 3.0 x 1010 / 1100                = 54.54 x 103 m/s

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