Mechanical Advantage and Efficiency

Front

What is Mechanical Advantage?

Back

Mechanical Advantage is the ratio of the output force produced by a machine to the input force applied to it. It measures how much a machine multiplies force.

Front

What is Efficiency in the context of machines?

Back

Efficiency is a measure of how well a machine converts input energy into useful output energy, expressed as a percentage.

Front

How is Efficiency calculated?

Back

Efficiency is calculated by dividing the work output by the work input and multiplying by 100.

Front

What does a simple machine do?

Back

A simple machine allows users to apply less force over a longer distance, reduces the amount of force needed to do work, and can change the direction of the applied force.

Front

True or False: A simple machine does not help you do less work.

Back

True

Front

What is the formula for calculating Efficiency?

Back

Efficiency (%) = (Work Output / Work Input) x 100

Front

If a machine has a work input of 40 joules and a work output of 35 joules, what is its efficiency?

Back

87.50%.

Front

What is the purpose of using a lever?

Back

A lever is used to lift or move loads with less effort by applying force at a distance from the fulcrum.

Front

What is the difference between input force and output force?

Back

Input force is the force applied to a machine, while output force is the force exerted by the machine.

Front

What is a Fulcrum?

Back

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