During a lightning flash, there exists a potential difference of Veloud the grou

Question

During a lightning flash, there exists a potential difference of Veloud the ground to the cloud Vground 3.0 x 109 V between a cloud and the ground. As a result, a charge of -20 C is transferred from (a) How much work Wground-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 were converted into heat, how many kilograms of water at 0°C could be heated to 100 c Wground-dloud kg GO Tutorial

Explanation / Answer

a) W= q(potential difference)= 20*3*109= 60*109 J

b) using work energy equation

Workdone= change in kinetic energy

60*109= 0.5 (1100)(v2-0)

v= 10444.66 m/s

c) Q= mc(temp change)

60*109= m*4186*100

m= 143334.926 kg

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