circular motion Flashcards
uniform circular motion
direction changes at every point but speed in constant
time for 1 rotation is represented in?
periods T (s)
Vtan =
2(pi)r/T (m/s)
frequency
number of revolutions per second
f= rev/ sec = 1 Hertz
The relationship between frequency and period is?
inverse
f= 1/T
T= 1/f
centripetal force
“center seeking”
direction of force towards the center
centripetal acceleration
the acceleration towards the center
Ac= v^2/r
changes in direction of objects velocity vector
Fc= mc (v^2/r)
FBD in circular motion
Fc does not go on FBD
-Ft, Fg, Ff start at the object and point towards the center
for an object to be in uniform circular motion there must be?
a net force acting on it
centripetal force
is a net force
with vertical circles toward the center is…
positive
What must be acting on an object in order for it to be in circular motion?
There must be a force acting on an object for it to be in circular motion
The centripetal force is a?
net force
With verticle circles which way is positive?
Towards the center in positive
Newtons Laws of Universal Gravitation
- gravitational force is a field force between two particles
- force varies as the inverse square of the distance
- force is proportional to mass of objects, gravity force acts form the center of the object
- gravity is always an attractive force
Equation for Force of Universal Gravitation
F = G m1m2/r^2
Value of G?
6.67 x 10 ^-11
In the universal gravitation equation what is r?
r is equal to the distance between the center of mass 1 to the center of mass 2
acceleration due to gravity (g) equation?
g = G m2/r^2
How to find velocity of a satelite in orbit?
F univ. g = Fc
solve
Vtan = sq. rt Gm2/r
