To calculate the average power output of
the engine, we need to calculate the work done by the engine and divide it by
the time taken.
Calculate the work done by the engine
The work done by the engine is equal to the
change in kinetic energy of the car.
The kinetic energy () is given by:
Where:
is the mass of the car (1500 kg),
is the velocity of the car.
We calculate the initial and final kinetic
energy:
- Initial kinetic energy ()
when the car is moving at 0 m/s:
- Final kinetic energy
() when the car is moving at 20 m/s: