Chapter 11 Flashcards
The amount of work is dependent upon what
The magnitude of the force
What is work
The transfer of energy from one body to another
Work is directly proportional to what
Force
The equation for work is
W = Fd
What is the SI unit of work
The Joule
I Joule is defined as
A newton-meter
Work is a what kind of quantity
Scaler
The equation to find work when the force is done at an angle to the object is
W = Fdcosø
What is the time rate of doing work
Power
The SI unit of power is
The watt
One horsepower is equal to approximately how many watts
746 W
The equation for work in terms of power is
W = Pt
The force applied to a lever is called the
Input force (Fi)
The force that the lever applies is called the
Output force (Fo)
The distance through which the input force acts is called the
Input distance
The distance through which the output force ask is called the
The output distance
The distance from the fulcrum to the load is called the
Output lever arm
The distance from the fulcrum to the application of the input force is called the
Input lever arm
The work done on the lever is called the
Input work
The work that the lever does is called the
Output work
The input work is equal to
The input force times the input distance
The output work is equal to
The output force times the output distance
The law of levers states
The input force times the length of the input arm equals the output force times the length of the output lever
The ability of a machine to multiply force is called the
Mechanical advantage
The actual mechanical advantage of any machine is equal to
The ratio of the output force to the input force
The ideal mechanical advantage based on distance is equal to
The ratio of the input distance to the output distance
The ideal mechanical advantage in terms of the lever arms is equal to the ratio of
The input lever arm to the output lever arm
Class one lever
The input force and load are located on opposite sides of the fulcrum
Class two Lever
The load is between the fulcrum and the input force
Class III lever
The input forces between the fulcrum in the load
