A motor having an efficiency of 0.8 uses 800 J of electrical energy. The output energy of the motor is:
Question
A motor having an efficiency of 0.8 uses 800 J of electrical energy. The output energy of the motor is:
Solution
The efficiency of a motor is given by the formula:
Efficiency = Output Energy / Input Energy
In this case, we know the efficiency (0.8) and the input energy (800 J). We can rearrange the formula to solve for the output energy:
Output Energy = Efficiency * Input Energy
Substituting the given values:
Output Energy = 0.8 * 800 J = 640 J
So, the output energy of the motor is 640 Joules.
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