A car accidentally rolls down a driveway for 8.0m while a person pushes agqinst the car with a foce 850 N to bring it to a stop.
1 answer:
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Answer:
Explanation:
This is the equation that defines the power consumed by an electrical circuit. It is normally defined as the product of the voltage applied (V) times the current (I) that runs through it. And in the case of a resistive circuit (resistors in the circuit totaling a certain resistance R), one can use Ohm's law to replace the voltage by the product of the current (I) times the resistance (R), obtaining then the square of the current:
Answer:
The time constant is
Explanation:
From the question we are told that
the time take to charge is
The mathematically representation for voltage potential of a capacitor at different time is
Where is the time constant
is the potential of the capacitor when it is full
So the capacitor potential will be 100% when it is full thus 100% = 1
and from the question we are told that the at the given time the potential of the capacitor is 85% = 0.85 of its final potential so
V = 0.85
Hence