AQA A Level Physics复习笔记7.3.4 Geostationary Orbits
Synchronous Orbits A synchronous orbit is: When an orbiting body has a time period equal to that of the body being orbited and in the same direction of rotation as that body These usually re...
AQA A Level Physics复习笔记7.3.3 Escape Velocity
Escape Velocity To escape a gravitational field, a mass must travel at the escape velocity This is dependent on the mass and radius of the object creating the gravitational field, such as a ...
AQA A Level Physics复习笔记7.3.2 Energy of an Orbiting Satellite
Energy of an Orbiting Satellite An orbiting satellite follows a circular path around a planet Just like an object moving in circular motion, it has both kinetic energy (KE) and gravitational...
AQA A Level Physics复习笔记7.3.1 Circular Orbits in Gravitational Fields
Circular Orbits in Gravitational Fields Since most planets and satellites have a near circular orbit, the gravitational force FG between the Sun and another planet provides the centripetal f...
AQA A Level Physics复习笔记7.2.4 Work Done on a Mass
Work Done on a Mass When a mass is moved against the force of gravity, work is done The work done in moving a mass m is given by: ∆W = m∆V Where: ∆W = change in work done (J) m = mass (kg) ∆...
AQA A Level Physics复习笔记7.2.3 Graphical Representation of Gravitational Potential
Graphical Representation of Gravitational Potential Gravitational field strength, gand the gravitational potential,V can be graphically represented against the distance from the centre of a ...
AQA A Level Physics复习笔记7.2.2 Calculating Gravitational Potential
Calculating Gravitational Potential The equation for gravitational potential V is defined by the mass M and distance r: Where: V = gravitational potential (J kg-1) G = Newton’s gravitational...
AQA A Level Physics复习笔记7.2.1 Gravitational Potential
Gravitational Potential The gravitational potential energy (G.P.E) is the energy an object has when lifted off the ground given by the familiar equation: G.P.E = mgΔh The G.P.E on the surfac...
AQA A Level Physics复习笔记7.1.5 Gravitational Field Strength in a Radial Field
Gravitational Field Strength in a Radial Field The gravitational field strength, g at a point describes how strong or weak a gravitational field is at that point g in a radial field (such as...
