Basics
The def of Work
the energy transferred to or from an object via the application of force along a displacement
The distance through which the input force acts in a machine is called...
Input Distance
A lever is...
a simple machine made of a rigid beam and a fulcrum
Mechanical Advantage is...
a measure of the force amplification achieved by using a tool, mechanical device or machine system.
Def of Input Force
the force you apply to the machine
SI unit for work/energy
Joule
The distance an output force acts through in a machine is?
Output Distance
Def of Fulcrum
the point at which a bar, or something that is balancing, is supported or balances
What is actual mech. advantage?
its the mechanical advantage determined by physical measurement of the input and output forces
Def of Output Force
the force the machine applies to the object
Def of Power
The rate of doing work
Any device designed to translate some form of energy into useful work
Machine
1) An input arm is...
2) An output arm is...
1)The side of a lever on which force is applied.
2)the portion of the lever directly connected to the load
Def of Ideal Mech. Advantage
the mechanical advantage of a perfect machine with no loss of useful work caused by friction between moving parts
What is work input?
the amount of energy supplied to the machine
What is a measure of the rate of energy transfer over a unit of time?
Watt
A machine consisting of two or more simple machines is a...
Compound Machine
Wheel + Axle is a...
type of simple machine used to make tasks easier in terms of manipulating force by applying the concept of mechanical advantage
What is an inclined plane?
A simple machine consisting of a sloping surface, used for raising heavy bodies
What is work output?
the energy given by the machine to do useful work
The rate at which work is done or the power an engine produces
Horsepower
A wedge is....
a simple machine that consists of two inclined planes, giving it a thin end and thick end
What does a screw do (physics)?
converts rotational motion to linear motion, and a torque (rotational force) to a linear force
What are Pulleys?
mechanisms compost by wheel and rope used to lift heavy objects onto tall heights
Efficiency is a ratio of...
the ratio of useful energy output to the total energy input in a physical process or system, expressed as a percentage