Circular motion

angular velocity

it is the rate of change of an angle with respect to time

What remains constant in a circle angular or linear velocity

angular

Centripetal force

It is the force towards the centre of a circle needed to keep a body moving in that circle

Centripetal acceleration

it is the acceleration towards the centre of a circle that a body has if it is moving in that circle

Factors that affect centripetal force

Mass

speed

radius

Formula for centripetal force

F=mv^2/ r

Formula for centripetal acceleration

a= v^2/ r

Formula for speed of satellite

v=(GM/R)^1/2

period of a satellite

it is the time taken for a satellite to go once around the central body

Formula for period of satellite

T=2(3.14)R/ v

Kepler's third law

it states that for a planet orbiting the sun the square of the period of its orbit is directly proportional to the cube of its orbit