Suppose a potential difference of Vcloud - Vground =1.3 *10^9 V exist between th

Question

Suppose a potential difference of Vcloud - Vground =1.3 *10^9 V exist between the cloud and the ground, and q = -25 C of charge is transferred from the ground to the cloud. (a) How much work W ground-cloud is done on the charge by the electric force? (b) If the work done by the electric force were used to accelerate a 1100-kg automobile from rest, what would be its final speed? (c) If the work done by the electric force are converted into heat, how many kilograms of water at 0 degrees Celsius could be heated to 100 degrees Celsius?

Explanation / Answer

a) W = 1.3*10^9 * 25 = 32.5 *10^9 J b) 32.5 *10^9 = 0.5* 1100* v^2 v = 7687.06 m/s c) 32.5 *10^9 J = 7.88*10^-9 cal = m* 100 m = 7.88*10^-7 kg

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