Concept explainers
The difference in the speed of the two balls when they hit the ground.
Answer to Problem 68GP
Explanation of Solution
Given:
Charges,
Mass,
Height,
Formula used:
Where,
h is the height
The potential energy is given by
Where,
The kinetic energy is given by
Where,
Calculation:
Since the electric field points downward the surface of the Earth is a lower potential than points above the surface.
Given that the surface of the Earth has zero volts and height of
Also, the surface of the Earth has zero location for the gravitational potential energy.
So, the conservation of energy relating the charge spheres at
Speed for positive charge:
Speed for negative charge:
Now, find the difference between both velocity:
Conclusion:
The required value is
Chapter 17 Solutions
Physics: Principles with Applications
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