Gravity and Motion Flashcards
Keppler’s 3rd law can be derived from
Newton’s law of Gravitation and circular motion
Period
The time taken for one revolution or complete cycle
Centripetal force
Force acting on an object that is traveling in a circle that constantly either pushes or pulls the object towards the centre
Grav Field strength
The net force per unit mass at a particular point in a grav field
formula to calculate centripetal force
Fc=mv^2/r
recall Newton’s law of universal gravitation
The force of attraction between a pair of point particles is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
Keppler’s first law of planetary motion
All planets move around the sun in elliptical orbits with the sun as one of the foci
Keppler’s 2nd law of planetary motion
a radius vector connecting a planet and the sun sweets out equal areas in equal lengths of time
Vertical and horizontal components of velocity
when an objects velocity is resolved into its horizontal or vertical components using trig or pythag
avg speed
the rate of change of distance, calculated by distance/ time
a formula to calculate centripetal force using period
Fc=m4(pi^2)r/T^2
Normal Force
the force acting along an imaginary line drawn perpendicular to the surface
Uniform circular motion
an object that moves in circular pathway at constant speed, due to a force acting on the object towards the centre of motion
the formula to calculate the force that accelerates an object down an inclined plane due to its weight
Fparallel= mgsin(theta)
Centripetal acceleration
the acceleration experienced by an object in a circular path, directed towards the centre of the circle
