Question

Give two examples of when a machine is used to apply the force at a convenient point.

Answer 1

1. A machine is a device that overcomes a large resistive force at a given point by applying a small force in a convenient direction at a convenient point.
2. A device is called a machine if it allows applying the force at a convenient point.

Examples:

1. To rotate the rear wheel of the bicycle we apply force on the pedal.
2. To stop the rotating wheels of a car, we apply force on the brakes of the car.