Concept explainers
The potential difference between a storm cloud and the ground is
a. How much energy is transferred to the ground in this lightning flash?
b. If this much energy were used to accelerate a 3500-kg truck from rest, how fast would the truck end up going?
(a)
The energy transferred to the ground during lightning.
Answer to Problem 44A
The energy transferred =
Explanation of Solution
Given data:
Potential difference between storm cloud and ground,
Charge transferred
Formula used:
The energy transferred is also known as the work done, and the work done is given as,
Where,
W = work done.
q = Charge.
U = potential energy
Calculation:
The energy transferred will be:
Conclusion:
The energy transferred =
(b)
The speed of truck got accelerated due to this energy transferred.
Answer to Problem 44A
The velocity of truck =
Explanation of Solution
Given data:
Potential difference between storm cloud and ground, U =
Charge transferred, q
Mass of truck, m
Formula used:
The work done will be the change in kinetic energy.
Where,
K.E. = kinetic energy.
m = mass of truck.
v = velocity of truck.
Calculation:
The final velocity of truck will be.
Conclusion:
The velocity of truck = 292.77 m/s.
Chapter 33 Solutions
Conceptual Physics: The High School Physics Program
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