A ball drops some distance and gains 30 J of kinetic energy. How much gravitational potential energy did the ball start with? Do
1 answer:
Answer:
The gravitational potential energy of the ball is more than 30 J.
Explanation:
Given that,
Gains kinetic energy = 30 J
We need to calculate the gravitational potential energy
According to law of conservation of energy
If there is no air resistance then the potential energy of the ball fully converted into kinetic energy.
If the air resistance is considered then the potential energy used to do work against air resistance.
According to question,
A ball drops some distance and gains 30 J of kinetic energy and considers air resistance then 30 J of potential energy can be loosed by the ball.
Hence, The gravitational potential energy of the ball is more than 30 J.
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Explanation:
Below is an attachment containing the solution.
Answer: Here is the complete question:
A small 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 103 N/C. If the ball is in equilibrium when the string makes a 30 angle with the vertical, what is the net charge on the ball?
Answer: The charge on the ball is 5.71 × 10^-4 C
Explanation:
Please see the attachments below
