Simple Machines

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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, making work easier. Examples include levers, pulleys, and wedges.

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What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied. 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 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 a wedge?

Back

A wedge is a simple machine that is used to split, cut, or lift objects. It consists of two inclined planes joined together.

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What is a screw?

Back

A screw is a simple machine that converts rotational motion into linear motion. It consists of a cylindrical shaft with a helical ridge.

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What is work in physics?

Back

Work is done when a force applied to an object causes it to move. It is calculated as the product of force and displacement in the direction of the force.

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What is the formula for calculating work?

Back

Work = Force x Displacement (W = F x d) where W is work, F is force, and d is displacement.

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What is the role of friction in simple machines?

Back

Friction is a force that opposes motion. It can reduce the efficiency of simple machines by requiring more input force to achieve the same output.

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What is an example of a compound machine?

Back

A bicycle is an example of a compound machine, as it combines multiple simple machines like levers (pedals) and wheels.