Chapter 2 Flashcards
Forces, Circular Motion, and Gravitation (29 cards)
Kinetic frictional force
F=μkN
Centripetal force
Fc=m(v²/r)
Gravitational force
F=G(m₁m₂)/r²
Change of an angle, lacking ωt
⌂θ=½at²+ω₀t
Final angle, lacking α
θt=θ₀+½(ω₀+ωt)t
Final angular velocity, lacking θ
ωt=ω₀+αt
Final angular velocity, lacking t
ωt²=ω₀²+2α⌂θ
Newton’s First Law
Objects will remain in their present state unless acted upon by a force (inertia exists)
Newton’s Third Law
Tension=weight
Net force on an object (inclined plane)
Fnet=T-mgsinθ-μk(mgcosθ)
Acceleration of an object sliding down a frictionless, inclined plane
a=gsinθ
Normal force on an object (inclined plane)
N=mgcosθ
Arc length, measured in radians
S=θr
Distance around a complete circle (circumference)
S=2πr
Finding angular acceleration
α=a/r
Finding angular velocity with uniform velocity
ω=v/r
Centripetal acceleration with uniform velocity
Ac=v²/r
Centripetal acceleration with angular velocity
Ac=ω²r
Finding angular velocity with π
ω=2π/T
Period (T)
The time to complete the full revolution of a circle
Finding period (T) with f
T=1/f
Kepler’s First Law
All orbital paths are elliptical
Kepler’s Second Law
An orbiting object moves faster and is subject to greater force when it is closer to the object it orbits
Kepler’s Third Law
T² is proportional to R³ (orbital radius)
