Force and Work
what is resistance force
force that a machine is lifting
First class lever in static equilibrium has a 75lbs resistance force and a 25 lbs effort forte, the effort force is located 6ft from the fulcrum. What is the actual mechanical advantage
75/25 = 3
what is the boiling point for Fahrenheit
212
what is the symbol for ohms
Greek omega
A valve is designed to operate with 40lbs of effort. The valve will encounter 160lb of resistance force applied to a 2 in diameter axle. what is the required actual mechanical advantage of the system?
160/ 40 = 4
What is effort force
force applied to a simple machine from the user
what is the static equilibrium equation
FeDe+FrDr
0 degrees Kelvin (theoretical)
what is current measured in
amps
the effort distance of a screwdriver is equal to the
length
what unit to we measure work in
joules
what is the formula for actual mechanical advantage
Fr/ Fe
does thermal energy flow from hot to cold or cold to hot
hot to cold
9v batteries used to run a motor with 30 ohm resistance .What is the current.
0.3 amps
what other simple machine could a screw be described as
incline plane
Define Work
The amount of force applied to displacement in the same direction
what is the formula for ideal mechanical advantage
De/Dr
define thermodynamics
study of relations between heat, work, temp, and energy
what is voltage measured in
Volts
what does TPI stand for
threads per inch
What is a force
The push or pull of an object to change its velocity
What are the 6 simple machines
wedge, lever, wheel and axle, incline plane, pulley, screw
Define thermal energy
energy contained in a system that is responsible for its temperature
What is ohms law
V=IR
Out over in except for...
win/wout