Concept and Theory of Levers

What is the function of a lever?

• Change the direction of force

• Increase force

• Decrease force

• All answers are correct

What are the main parts of a lever?

• Fulcrum, load point, and effort point

• Load arm and effort arm

• Load and effort

• All answers are correct

How can the mechanical advantage of a lever be calculated?

• MA = Load arm / Effort arm

• MA = Effort arm / Load arm

• MA = Load / Effort

• MA = Effort / Load

In a first-class lever, the fulcrum is located between...

• Load and effort

• Load only

• Effort only

• Outside the load and effort

In a second-class lever, the load is located between...

• Fulcrum and effort

• Fulcrum only

• Effort only

• Outside the fulcrum and effort

In a third-class lever, the effort is located between...

• Fulcrum and load

• Fulcrum only

• Load only

• Outside the fulcrum and load

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

• Wheelbarrow

• Bottle opener

• Seesaw

• Pliers

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

• Nail clipper

• Crowbar

• Tweezers

• Screw

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

• Hammer

• Pliers

• Ice tongs

• All answers are correct

What is the main purpose of using levers in daily life?

• To make work easier

• To save energy

• To change the direction of force

• All answers are correct