Mechanical Systems Flashcards
what do mechanical systems have?
All mechanical systems have a source of energy.
List the Classical Simple machines:
Inclined Plane, lever, wedge, wheel and axle, pulley and screw.
What does a Screw do?
It is a mechanism that converts rotational motion to linear motion.
What does a wedge do?
Designed to separate two objects, lift up an object, or hold an object in place.
What is the fixed point called?
The fulcrum
What is effort force?
The force you put or exert on a lever to make it move.
What is load?
The mass of an object moved or lifted by a machine such as a lever.
What is effort arm?
The distance between the fulcrum and the effort force.
What is load arm?
The distance between the fulcrum and the load.
What is class 1 lever?
The fulcrum is between the effort force and the load. Example: Scissors
What is class 2 lever?
Class 2 lever is when the load is in the middle and the effort is on the right side. Example: Wheel barrow.
What is class 3 lever?
The effort is in the middle and the load is on the right side.
What is an inclined plane?
A ramp or slope that reduces the amount of force or work you need to exert to lift something.
What is a winch?
Consists of a smaller cylinder and a crank or handle.
What is a gear?
A rotating wheel like object with teath around its rim.
What is a gear train?
A group of two or more gears.
What is a driving gear?
First gear, the one in which the intintial force is applied.
What happens when gears are in contact?
Turn in opposite directions.
Sprockets and Chains
Turn in the same direction.
What is kinetic energy?
Kinetic energy= Energy in motion
What is potential energy?
Stored energy.
Transmission
Energy can be transmitted from one place to another, but energy can’t be converted or changed.
WORK:
Work is energy in action: you do work on the object. Work is energy in action. Work is measured in newtons.
Speed Ratio is:
The relationship between the speeds of rotations of a smaller gear and a larger gear.
