Vocabulary
Define Force
What is the push or pull on an object?
De/Dr
What is IMA (Ideal Mechanical Advantage)?
Calculate the actual mechanical advantage of a first class lever with 75 lbs of resistance force and 25 lbs of effort force
AMA=3
Define voltage
What is the potential difference?
Voltage
Define thermal energy
Energy contained within a system
Unit used to measure force
What is Newtons?
AMA (Actual Mechanical Advantage)
What is Fr/Fe?
Wheel barrow lifts 150lb load. The length from wheel to center effort is 6ft. Length from wheel and load is 4 ft.
Calculate IMA
1.5
Define Current
What is the flow of electrons?
Measured in Amps
Three types of thermal energy transfer
Convection, Conduction, Transduction
Unit used to measure work
What is Joules?
(AMA/IMA)x100
What is the efficiency of a machine?
Gear A has 12 teeth
Gear B has 32 teeth
Calculate the gear ratio
Define resistance
What is a measure of the opposite current?
measured in ohms
Define efficiency
the ratio of the work done on the load by the machine to the work done on the machine by the effort
The ratio of force produced by a machine, to the force applied to it
What is mechanical advantage?
Gear ratio
What is out/in except for Win?
Pulley with two strands used as lever. Lever is first flass lever with lnegth of 12ft. Distance from fulcrum to resistance is 4ft. Lever is lifting 140lbs.
Calculate compound mechanical advantage
4
Voltage is measured in _____, current is measured in ____, and resistance is measured in ____
volts; amps; ohms
Define magnitude
Measurement of force on a vector
Name all simple machines
What are wheel and axle, inclined plane, wedge, pulley, lever, screw
FeDe=FrDr
Static Equilibrium
0 kelvin
A 9v battery is used to run a motor with a 30 ohm resistance.
What is the current?
0.3 amps
Who is the GOAT guest of engineering
Mr. Comstock