Efficiency Calculation of a Car Engine
If a car engine accomplishes 4000 joules of work but burns gas equivalent to 16000 joules of energy, what is the efficiency of the engine
16,000/4,000=4*100= 400
Answer:
The efficiency of the engine is 25%.
Explanation:
Given that,
Output energy = 4000 J
Input energy = 16000 J
The efficiency of the engine is equal to the output energy divided input energy.
Formula of the efficiency is defined as,
η = Output energy / Input energy x 100
η = 4000 / 16000 x 100
η = 0.025 x 100
η = 25%
Hence, The efficiency of the engine is 25%.