Simple machines allow people to make tradeoffs that reduce the amount of work necessary to perform a task. Simple machines may convert one type of force to another, change the direction of an applied force or trade distance travelled for force applied.
Machines make work easier by multiplying the force a human can exert and allowing automation of production. Simple machines, such as the lever and pulley, grant humans the ability to move objects too heavy for manual manipulation. Automation means that a single person can oversee the work of numerou
Machines make work easier by changing the force on an object. Work occurs when an individual applies force to an object, and when a machine is used, the machine applies the force to the object instead of the individual.
Modern automation speeds up manufacturing and makes it possible to get more work done in less time with fewer personnel. Computers and information technology have enabled an unprecedented level of access to knowledge. Transportation technology has reduced the time it takes to travel from one place t
A pulley makes work easier by redirecting and amplifying force. It helps reverse the direction of an individual’s lifting force. As a user pulls a rope down, the pulley lifts the weight up. When two ropes and wheels are used, a pulley reduces the effort needed to lift a weight by half.
A lever makes work easier because it allows a person to move an object using less force. To reduce the force that is necessary to move the object, the person using the lever has to increase the distance for the area they are applying the force.
A wedge utilizes a principle known as mechanical advantage in order to reduce the force needed to lift or separate an object. When driven under load, wedges function by transferring the direction of force applied.
A fixed pulley makes work easier by changing the direction of the force required to lift a load. To raise a load with a fixed pulley, a downward force is needed, which is easier than the upward force needed to lift the load directly.
An inclined plane makes work easier by reducing the exertion needed for the job while increasing the distance over which that exertion is maintained. The angle at which a load is lifted determines the amount of exertion needed to lift it. Lifting a load straight overhead requires the most exertion.
A stationary object on a uniform, flat surface requires the same amount of force to push or pull. As long as the pushing or pulling force is strong enough to overcome the static friction force, the object will move.