The efficiency of the power is 70%. This means that 70% of the energy supplied by the battery is used to move the car, and the remaining 30% is lost as heat and other forms of energy loss.
How to calculate the valueThe efficiency of the power is calculated as follows:
Efficiency = Work output / Work input
The force is the weight of the car, which is 250,000 N, and the distance is 64 m. So the work output is:
Work output = 250,000 N * 64 m
= 16,000,000 J
The voltage is 375 V, the current is 32 kA, and the time is 2 seconds. So the work input is:
Work input = 375 V * 32 kA * 2 s = 23,040,000 J
The efficiency is then:
Efficiency = 16,000,000 J / 23,040,000 J = 70%
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