AQA A Level Physics复习笔记6.1.5 Centripetal Force
Calculating Centripetal Force An object moving in a circle is not in equilibrium, it has a resultant force acting upon it This is known as the centripetal force and is what keeps the object ...
AQA A Level Physics复习笔记6.1.4 Centripetal Acceleration
Calculating Centripetal Acceleration Centripetal acceleration is defined as: The acceleration of an object towards the centre of a circle when an object is in motion (rotating) around a circ...
AQA A Level Physics复习笔记6.1.3 Angular Speed
Angular Speed Any object travelling in a uniform circular motion at the same speed travels with a constantly changing velocity This is because it is constantly changing direction, and is the...
AQA A Level Physics复习笔记6.1.2 Radians
Radians In circular motion, it is more convenient to measure angular displacement in units of radians rather than units of degrees The angular displacement (θ) of a body in circular motion i...
AQA A Level Physics复习笔记6.1.1 Circular Motion
Circular Motion Velocity and acceleration are both vector quantities An object in uniform circular motion has a constant linear speed However, it is continuously changing direction. Since ve...
AQA A Level Physics复习笔记5.4.2 Required Practical: Investigating EMF & Internal Resistance
Required Practical: Investigating EMF & Internal Resistance Aims of the Experiment The overall aim of the experiment is to investigate the relationship between e.m.f and internal resista...
AQA A Level Physics复习笔记5.4.1 Electromotive Force & Internal Resistance
Electromotive Force When charge passes through a power supply such as a battery, it gains electrical energy The electromotive force (e.m.f) is defined as: The amount of chemical energy conve...
AQA A Level Physics复习笔记5.3.4 Potential Divider Circuits
Potential Divider Circuit When two resistors are connected in series, through Kirchhoff’s Second Law, the potential difference across the power source is divided between them Potential divid...
AQA A Level Physics复习笔记5.3.3 Electrical Energy & Power
Energy & Power In mechanics, power P is defined as the rate of doing work The potential difference is the work done per unit charge Current is the rate of flow of charge Therefore...
