Potpourri
Levers & Machines
Terms
Units
Formulas
100
Defined as the ability to do work
What is energy
100
point around which a lever rotates
What is the fulcrum
100
machines make work easier by reducing force and increasing
What is distance
100
unit of force
What is a Newton
100
mass x acceleration
What is force
200
the force you apply to a machine
What is effort force
200
resistance arm is between the effort arm and the fulcrum
What is a 2nd class lever
200
amount of work done per unit of time
What is power
200
units for mechanical advantage
What are no units, just a number
200
force times distance (f*d)
What is work
300
a device made up of more than one simple machine
What is a compound machine
300
fulcrum @ one end, resistance force @ the other, effort in the middle
What is a 3rd Class lever
300
movable pulleys multiply this...
What is effort force
300
unit for work (Newton-meter)
What is a Joule
300
length of effort divided by length of resistance (Le / Lr)
What is IMA (Ideal Mechanical Advantage)
400
He invented the screw
Who is Archamedies
400
fixed pulleys make lifting easier by changing
What is the direction of the force
400
when a machine is used to perform a task, work output is always ______________ than work input
What is less
400
unit for power (Joule/second)
What is a Watt
400
1/2 mass * velocity squared (1/2m*v2)
What is KE (Kinetic Energy)
500
2 factors to consider if work is being done
1) something has to move 2) the motion has to be in the same direction as the force
500
device that does work with only one movement
What is a simple machine
500
ratio of resistance force divided divided by effort force give you this
What is mechanical advantage
500
final velocity minus initial velocity divided by time give this
What is acceleration (m/s2)
500
mass(kg)*9.81m*height(m)
What is GPE (Gravitational Potential Energy)
M
e
n
u