Title: Theory / Unimportant / Experimental / Machines / Basic and how they work - navy / Lever
Tags: hasSeenConjDef

Name: The lever
Definition: a fulcrum
Page: 2
Chapter: 1
Definition2: a force or effort
Conjdef: A machine, composed of
Definition3: a resistance

Name: The fulcrum
Definition: The fixed point of a lever
Page: 2
Chapter: 1
Context: Lever
Denoted by: \(F\)

Name: The force
Definition: The action done on the lever
Page: 2
Chapter: 1
Context: Lever
Name2: The effort
Denoted by: \(E\)

Name: The resistance
Definition: What resists the force in the lever
Page: 2
Chapter: 1
Context: Lever
Denoted by: \(R\)

Name: First class lever
Definition: A lever in which fulcrum is located between the effort and the resistance
Page: 2
Chapter: 1
Context: Lever
Example3: Crowbars, shears, and pliers

Name: Second class lever
Definition: A lever in which resistence is located between the effort and the fulcrum
Page: 2
Chapter: 1
Context: Lever
Example2: pelican hook

Question: Which kind of lever to use to overcome big resistance
Answer: one and 2
Page: 2
Chapter: 1

Question: Which kind of lever to use to speed up movement ?
Answer: 3
Page: 2
Chapter: 1

Name: A third class lever
Definition: A lever in which effort is between fulcrum and resistence.
Page: 2
Chapter: 1
Example2: Pushing a door near the hinges

Question: What is the equation relating those values
Answer: AE=Ra
Page: 4
Chapter: 1
Variables: A length of effort arm
a length of resistance arm
E Effort force
R Resistence force

Question: How to compute the length of a lever arm, when the lever is not straight ?
Answer: Draw a line where the force is applied, in the direction of the force. Take the perpendicular to this line thourgh the fulcrum.
Page: 5
Chapter: 1