Question

A machine has an efficiency of 15% . If the energy inputs is 300 joules, how much useful energy is generated

Answer 1

Answer:

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Explanation:

Answer 2

The useful energy generated by the machine having an efficiency of 15% and an energy input of 300 J is 45 J

• From the question given above, the following data were obtained:

Efficiency = 15% = 0.15

Work input = 300 J

Work output =?

The useful energy generated (i.e work output) by the machine can be obtained as follow:

$Efficiency = \frac{workout}{workin} * 100\\\\0.15 = \frac{Workout}{300}$

Cross multiply

Work output = 0.15 × 300

Work output = 45 J

Therefore, the useful energy generated by the machine is 45 J

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