G484 -- Circular motion and oscillations

Pregunta	Respuesta
Centripetal acceleration	Acceleration of an object travelling in circle with a constant speed in a direction towards the centre of the circle
Field	A region in which a force operates
Gravitational field strength	Force acting per unit mass at a point
Newton's Law of Gravitation	The gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
Kepler's 3rd Law	The period of a planet squared is proportional to the mean radius of its orbit cubes
Geostationary orbit	An orbit of the Earth made by a satellite that has the same time period as the rotation of the Earth and is in the equatorial plane
Simple Harmonic Motion	Acceleration is directly proportional to the displacement. Acceleration is always directed towards the equilibrium position.
Damping	Deliberately reducing the amplitude of an oscillation
Resonance	Build-up of a large-amplitude oscillation when a driving frequency equals the natural frequency of an oscillating object.
Centripetal Force	The resultant force on an object, acting towards the centre of the circle causing it to move in a circular path
Free oscillations	When an object oscillates without a driving force acting to keep it oscillating. Objects undergoing free oscillations vibrate at natural frequency.

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