Work, Simple Machines, and Mechanical Advantage

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What is Work in physics?

Back

Work is defined as the product of force and the distance over which that force is applied. It is calculated using the formula: Work = Force x Distance.

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What is a Simple Machine?

Back

A simple machine is a device that changes the direction or magnitude of a force. Examples include levers, pulleys, inclined planes, wedges, screws, and wheel and axles.

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What is Mechanical Advantage?

Back

Mechanical Advantage is the ratio of the output force (resistance force) to the input force (effort force) in a machine. It indicates how much a machine multiplies force.

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What is a Lever?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. It is used to lift or move loads.

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What is a Fulcrum?

Back

A fulcrum is the pivot point around which a lever rotates. It is the point where the lever balances.

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How do you calculate the input force using Mechanical Advantage?

Back

Input Force = Output Force / Mechanical Advantage.

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What is Resistance (Output) Force?

Back

Resistance force is the force that an effort force must overcome to do work on an object using a simple machine.

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What is Effort (Input) Force?

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Effort force is the force that is applied to a machine to accomplish work.

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How do you calculate Work done against gravity?

Back

Work = Weight x Height, where Weight = mass x gravity.

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What is the formula for calculating Weight?

Back

Weight = mass x gravitational acceleration (approximately 9.81 m/s² on Earth).