Simple Machines and Work Review

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What is a simple machine?

Back

A simple machine is a device that makes work easier by allowing us to push or pull in a more efficient way. Examples include levers, pulleys, and ramps.

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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 pulley?

Back

A pulley is a simple machine that consists of a wheel on an axle or shaft that is designed to support movement and change the direction of force.

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What is work in physics?

Back

Work is done when a force is applied to an object and the object moves in the direction of the force. It is calculated as Work = Force x Distance.

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What is a load in the context of simple machines?

Back

A load is the object that is being lifted or moved using a simple machine.

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What is the fulcrum in a lever?

Back

The fulcrum is the pivot point around which a lever rotates.

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How does a ramp help in lifting objects?

Back

A ramp reduces the amount of effort needed to lift an object by increasing the distance over which the force is applied.

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What is the unit of measurement for force?

Back

The unit of measurement for force is the newton (N).

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What is the purpose of a spring scale?

Back

A spring scale is a tool used to measure force or weight by the amount of stretch in a spring.

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What is an example of a compound machine?

Back

A compound machine is made up of two or more simple machines. An example is a bicycle, which includes levers, wheels, and pulleys.