Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
Angular Velocity/Speed
|
*angular dispalcement/change in time
*SI Unit: rad/s or rev/s *ω |
|
Centripetal Acceleration
|
*center seeking acceleration
*rate of change of velocity/change in time *V^2/r *rω^2 |
|
When is there only centripetal accel., and no angular/tangential accel?
|
uniform circular motion
|
|
Centripetal Force
|
*net force that produces a centripetal acceleration
*friction/gravity/pushes//pulls from strings |
|
Angular Acceleration
|
*α
*time rate of change of angular velocity *change ω/change time *ω=ω(init) + αt |
|
Newton's Law of Gravitation
|
*every particle attracts every other particle w/ force proportional to product of their masses and inversely proportional to square of distance between them
|
|
Tangential Velocity
|
*v
arc length/time *v=s/t *=rω |
|
Torque
|
*τ
*tendency of a force to rotate an object *same as force in translational motion *nett torque changes rotational motion *vector quantity *τ= rF *SI unit: m*N |
|
Clockwise Torque
|
negative sign
|
|
Counter-Clockwise Torque
|
positive sign
|
|
Moment of Inertia
|
*I
*body's tendency to resist changes in its rotational motion I=(sum) mr^2 *SI unit: kg*m^2 |
|
Conservation of Energy
|
Kinetic (roatational) + Kinetic(translational) + Potential= all 3 above but initial
|
|
Law of conservation of angular momentum for rotating body
|
w.o external/unbalanced torque, total angular momentum of a system is conserved
*Iω=I(ini)ω(ini) |
|
angular impulse
|
change in angular momentum
|
|
Tensile Stress
|
elongating tension
<<< >>>> |
|
Compression Stress
|
shortening tension
>>>> <<<<< |
|
Stress vs. Strain graph
|
Tension>>>>> of axis crossing
Compression<<<<<of axis crossing |
|
Hooke's Law
|
F= k * Δ L
* ΔL(change in length) is proportional to the magnitude F of the deforming force |
|
Amount of elongation depends on
|
1. force applied
2. material object is made from 3. dimensions of object |
|
What is directly proportional to Stress?
|
Strain (in elastic region)
|
|
Pressure
|
*p
* normal force perpendicular/area force is applied *Pascal |
|
Density
|
*ρ
*ρ=m/v *kg/m^3 |
|
gauge pressure
|
you must add atmospheric pressure to gauge pressure to get absolute pressure
|
|
When does an object float?
|
*ρf>ρo
|
|
When does an object sink?
|
ρf<ρo
|