Front

What is Mechanical Advantage?

Back

Mechanical Advantage (MA) 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

How is efficiency defined in the context of machines?

Back

Efficiency is defined as the ratio of useful work output to total work input, expressed as a percentage. It indicates how effectively a machine converts input energy into useful work.

Front

What is the formula for calculating efficiency?

Back

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

Front

If a machine has an efficiency of 50%, what does this mean?

Back

It means that only 50% of the input work is converted into useful output work, while the other 50% is lost, often due to friction or other factors.

Front

What is the formula for calculating Mechanical Advantage?

Back

Mechanical Advantage (MA) = Output Force / Input Force

Front

If the input force is 100 N and the output force is 500 N, what is the Mechanical Advantage?

Back

MA = 500 N / 100 N = 5

Front

What is work in physics?

Back

Work is defined as the product of force and the distance over which it is applied. It is calculated using the formula: Work (W) = Force (F) x Distance (d).

Front

How do you calculate the work done when a force is applied?

Back

Work Done (W) = Force (F) x Distance (d). For example, if a 100 N force moves an object 5 m, the work done is 100 N x 5 m = 500 J.

Front

What is the unit of work in the International System of Units (SI)?

Back

The unit of work is the Joule (J). One Joule is defined as the work done when a force of one newton moves an object one meter.

Front

What does it mean if a machine has a Mechanical Advantage greater than 1?

Back

A Mechanical Advantage greater than 1 indicates that the machine can amplify the input force, making it easier to lift or move heavy objects.