Question

Your car’s engine takes 10000joules of energy per second. The

energy output measured in the car’s motion forward is 1600joules of
kinetic energy per second. What is the efficiency of the car?

Answer 1

The efficiency of the car is calculated by dividing the kinetic energy output by the total energy input and multiplying by 100, yielding an efficiency of 16%.

Step-by-step explanation:

The efficiency of the car can be calculated by dividing the useful energy output (the car's motion forward) by the total energy input (the energy the engine takes in) and then multiplying by 100 to get a percentage. In this scenario, the car's engine takes in 10000 joules of energy per second and the kinetic energy output measured is 1600 joules per second.

Efficiency = (Useful Energy Output / Total Energy Input) x 100%
Efficiency = (1600 J / 10000 J) x 100%
Efficiency = 0.16 x 100%
Efficiency = 16%

Therefore, the efficiency of the car is 16%.