Scientific Principles PPT 7 - Mechanical Advantage

What is the term used to describe the use of tools and equipment to make practical tasks easier?

• Mechanical advantage

• Electrical efficiency

• Thermal expansion

• Chemical reaction

What do machines do to the input force according to the concept of mechanical advantage?

• Reduce the input force

• Multiply the input force to a greater output force

• Convert the input force to heat

• Eliminate the input force

Why is using a spanner to tighten a compression nut easier than doing it by hand?

• The spanner is heavier

• The spanner is longer, acting as a bigger lever

• The spanner is made of metal

• The spanner is more colorful

Into how many categories do levers fall?

• 2 categories

• 3 categories

• 4 categories

• 5 categories

In a first-class lever, where is the fulcrum located?

• In the middle

• At one end

• At both ends

• There is no fulcrum

Which of the following is an example of a first-class lever?

• Crowbar

• Wheelbarrow

• Fishing rod

• Tweezers

In a Class 2 lever, where is the resistance located?

• At the fulcrum

• In the middle

• At the effort end

• At both ends

Which of the following is an example of a Class 2 lever?

• Scissors

• Wheelbarrow

• See-saw

• Fishing rod

In a Class 3 lever, where is the effort located?

• At one end

• In the middle

• At the fulcrum

• On both sides

Which of the following is an example of a Class 3 lever?

• Scissors

• Crowbar

• Tweezers

• Seesaw