The force acting in the connecting rod of a engine cylinder is f = 9000 n and the crank radius r = 75 mm. if the crank makes 4200 revolutions in 1.2 minutes, then find the brake work (wb) in kilowatts.

Brake power is defined as the power developed by an engine at the output shaft.

Mathematically can be expressed as,

Where,

T = Torque

N = Number of Revolution

Torque is defined as the force by the distance applied, that is

The number of revolution would be

Finally the Brake power would be:

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