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Angular frequency equation
ω = 2πf
gravitational field is always attractive
Explain why gravitational field is not the same as electric field
centripetal acceleration equation
a = v^2/r = vω
centripetal force equation
F = mv2/r = mrω^2
Define gravitational field strength
force per unit mass
Gravitational force equation
F = GMm/r2
g = GM/r2
Gravitational field strength equation
Gravitational potential equation
V = -GM/r, where V is the gravitational potential per unit mass, G is the universal gravitational constant, M is the mass causing the field and r is the separation of the objects' centre
E = GMm/2r
Kinetic energy of satellite equation
E = -GMm/r
Potential energy of satellite equation
v^2= (GM/r) =
Escape speed of satellite
Describe the properties of geostationary satellites
Above the equator moving in easterly direction and have the same period as the Earth
What is the significance of the negative sign of gravitational potential?
work got out to move to the point and it is always attractive
angle subtended at the centre of the circle and arc length equal to the radius
angular velocity
represented by a lower case omega (ω)
centripetal acceleration
a = centripetal acceleration
Centripetal Force
A force directed towards the center of a circle that causes an object to follow a circular path
field of force
region (of space) where a body experiences a force
geostationary orbit
an equatorial orbit which stays on the same point on the Earth with a period of 24 hours and moves from west to east
Gravitational field
a force field that exists in the space around every mass or group of masses
Gravitational Field Strength
gravitational force per unit mass experienced by a mass placed at that point
Gravitational Potential
work done per unit mass by an external agent in bringing a mass from infinity to that point without a change in kinetic energy.
gravitational potential energy
an icicle hanging from a rooftop
Newton's Law of Gravitation/Gravitational Force
Newton's law of gravitation states that the force of attraction between two point masses is directly proportional to the product of their masses and inversely proportional to the square of their distance apart.
Potential Energy
(mass) x (g) x (height)