AQA A Level Physics復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
AQA A Level Physics復習筆記7.1.4 Newton's Law of Gravitation
Newton's Law of Gravitation The gravitational force between two bodies outside a uniform field, e.g. between the Earth and the Sun, is defined by Newton’s Law of Gravitation Recall that the ...
