Applied Flashcards
When rotating, which direction is positive?
clockwise
what is the symbol of angular acceleration?
α
what is torque equal to?
radius * force
what are the units for moment of inertia?
kg m²
what are the units for angular momentum?
kg m² s⁻¹
what is moment of inertia for an object turning in a cycle?
mass times radius squared.
what is the symbol for angular momentum?
L
How is angular momentum found from linear momentum?
linear * radius
what is change of momentum equal to?
time * ΔTorque
what is the angular equivalent of force?
Torque. Symbol of T
Torque = force * radius
If you had a rotating satellite in space, why would you need two rockets to stop it spinning?
Single would give unwanted linear acceleration.
Two would give a couple with only angular acceleration.
What is the internal energy of an ideal gas?
As there is no attraction between the particles, the only energy is the KE
what is the symbol for internal energy?
u
What is the first law of thermodynamics?
conservation of energy
Heat energy applied to a system either increases the internal energy of a system or enables it to do work
What is meant by the work done on a gas?
The gas is compressed and u increases.
In the equation on the formula sheet, the w will be negative.
What are the ways of finding the work done to a gas when compressed?
forcedistance the piston went
force = pressurearea
work=pressureareadistance
What is adiabatic change?
No heat flow into or out of the system. Q=0
if doing an experiment, perform It very quickly to prevent energy from being transferred.
Thus any increase in the internal energy is equal to the work done on it.
What is an isobaric process?
A process that takes place under constant pressure
What is the area under a pressure volume graph?
Area under curve = work done.
What is torque?
Product of a force and the perpendicular distance of the line of action of the force from a particular point of rotation.