Circular motion & Gravitational fields Flashcards
Formula
Speed equals
speed = angular speed * radius
Definition
Centripetal force
Resultant force toward the center of the circle when the object is rotating at a constant speed
Definition
Centripetal acceleration
Acceleration toward the center of the circle when the object is rotating at a constant speed
Formula
Acceleration equals
(Speed)^2 / radius
Radius * (angular speed)^2
Definition
Gravitational field
Region where a mass experiences a gravitational force
Definition
Center of mass
Point where total mass of the object concentrated
Definition
Law of gravitation
2 point masses interact with a force proportional to their product of masses and inversely proportional to the square of their seperation
Formula
Gravitational force equals
G * Mass1* mass2 / (radius)^2
Definition
Gravitational field strength
Gravitational force exerted per unit mass on a small object at that point
Formula
Gravitational field strength equals
Force / mass
G * mass1 / (radius)^2
Definition
Gravitational potential
Work done per unit mass in bring a point mass from infinity
Formula
Gravitational potential Φ equals
-G * mass / radius
Formula
Gravitational potential difference
G * Mass * (1/radius1 - 1/radius2)
Formula
Speed to stay in a circular orbit equals
Sqrt(G * Mass / radius)
Formula
Orbital period equals
Sqrt(4(pi)^2 * (radius)^3 / G * Mass)
