Force, stability and statics

What do levers consist of?

• Load, rigid rod and force

• Fulcrum, load, and beam

• Rigid rod (beam), fulcrum (axis), resistance force and effort force

• Beam, axis, and resistance force

Distance in which the resistance acts from the fulcrum

• Resistance arm

• Effort arm

• Load

• Effort

Distance at which the effort acts from the fulcrum

• Load

• Resistance arm

• Effort arm

• Effort

The weight that needs to be moved in a lever

• Load

• Resistance

• Resistance arm

• Effort

Force that is applied to move the resistance

• Effort

• Resistance

• Load

• Fulcrum

In a first class lever, the fulcrum lies between the effort and the load

• TRUE

• FALSE

Functions of a lever

• To move load from one point to another

• "Es de maña no fuerza"

• To make our lives easier and just be lazy :)

• To increase the load (or force) that can be moved with a given effort and to increase the velocity at which an object will move with a given force

Examples of a first class lever

• The movement of the foot when walking, opening of a door by a handle, pushing a wheel barrow

• Using a hammer to take out a nail, a seesaw, scissors

• Bicep curl, fishing with a rod, swinging a bat to hit a baseball, tweezers or forceps

Examples of a second class lever

• The movement of the foot when walking, opening of a door by a handle, pushing a wheel barrow

• Using a hammer to take out a nail, a seesaw, scissors

• Bicep curl, fishing with a rod, swinging a bat to hit a baseball, tweezers or forceps

Examples of a third class lever

• The movement of the foot when walking, opening of a door by a handle, pushing a wheel barrow

• Using a hammer to take out a nail, a seesaw, scissors

• Bicep curl, fishing with a rod, swinging a bat to hit a baseball, tweezers or forceps