Who was the first to discover the principle of lever?

When did this person discover this principle?

• I have no idea

• Dinosaur ages

• 300 BC

• third century BC

What are the parts of a lever?

• Beam

• Fulcrum

• Effort arm

• Resistance Arm

• All of the above

What does the principle of lever state?

• Load*Load Arm = Effort*Effort Arm

• Load/Effort = Effort arm/Load arm

• Resistance x force + effort will be equal always

• All of the above

Select examples/example of 3rd class lever:

• tweezers

• Wheel barrow

• Ice tongs

• Fishing rod

• Spoon

What is the position of the parts of a lever in the 1st class lever?

• The Fulcrum is located between the Load and the Force.

• The Force is between the Load and the Fulcrum.

• The Load is between the Force and the Fulcrum.

Name the examples of a class 2 lever

• wheelbarrows, staplers, bottle openers, nut cracker, and nail clippers.

• see-saws, crow bars, hammer claws, scissors, pliers, and boat oars.

• shovels, fishing rods, human arms and legs, tweezers, and ice tongs.

• Wheelbarrows, shovels, pliers

Name a lever you use in your day to day life

If an effort of 23 kgf is applied on a machine to move a load of 184 kgf, the mechanical advantage will be 8. (True or false)

What kind of lever is this?

• 1^st class lever

• 2^nd class lever

• 3^rd class lever