B. Some of the ball’s energy is transformed to thermal energy.
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Answer:B
Explanation:
For work to be done, the object must move some distance as a result of a force
Answer:
Power factor of the AC series circuit is 
Explanation:
It is given that,
Impedance of the AC series circuit, Z = 60 ohms
Resistance of the AC series circuit, R = 30 ohms
We need to find the power factor of the circuit. It is given by :




So, the power factor of the ac series circuit is
. Hence, this is the required solution.
He feels a 10 N to the left force moves. Yes ,he moves.