Simple Machines and Mechanical Advantage Review

Front

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 inclined planes.

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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.

Front

What is a lever?

Back

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

Front

What are the three classes of levers?

Back

1st class lever (fulcrum in the middle), 2nd class lever (load in the middle), 3rd class lever (effort in the middle).

Front

How do you calculate work done?

Back

Work done (W) is calculated using the formula W = Force (F) x Distance (d) x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is the work-energy principle?

Back

The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.

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What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

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What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is a pulley?

Back

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

Front

What is an inclined plane?

Back

An inclined plane is a flat surface tilted at an angle to help raise or lower objects, reducing the amount of force needed to lift them.