AQA A Level Physics复习笔记4.6.1 Work & Power
Work & Power Work is defined as The amount of energy transferred when an external force causes an object to move over a certain distance If the force is parallel to the direction of the ...
AQA A Level Physics复习笔记4.5.5 Collisions
Elastic & Inelastic Collisions In both collisions and explosions, momentum is always conserved However, kinetic energy might not always be A collision (or explosion) is either: Elastic –...
AQA A Level Physics复习笔记4.5.4 Impulse on a Force-Time Graph
Impulse of a Force-Time Graph In real life, forces are often not constant and will vary over time If the force is plotted against time, the impulse is equal to the area under the force-time ...
AQA A Level Physics复习笔记4.5.3 Impulse
Force & Momentum Force is defined as the rate of change of momentum on a body The change in momentum is defined as the final momentum minus the initial momentum These can be expressed as...
AQA A Level Physics复习笔记4.5.2 Conservation of Momentum
The Principle of Conservation of Momentum The principle of conservation of linear momentum states: The total momentum before a collision = the total momentum after a collision provided no ex...
AQA A Level Physics复习笔记4.5.1 Linear Momentum
Linear Momentum Linear momentum (p) is defined as the product of mass and velocity Momentum is the product of mass and velocity Momentum is a vector quantity - it has both a magnitude...
AQA A Level Physics复习笔记4.4.3 Newton's Third Law
Newton's Third Law Newton's Third Law states: If body A exerts a force on body B, then body B will exert a force on body A of equal magnitude but in the opposite direction This means that ev...
AQA A Level Physics复习笔记4.4.2 Newton's Second Law
Newton's Second Law Newton's Second Law states that: The resultant force on an object is equal to its rate of change in momentum. This change in momentum is in the same direction as the resu...
2024-25年美国高中申请条件、要求、时间及流程汇总！
近几年，低龄留学越来越热，为了给以后上国外名校铺路，许多家长会将孩子送去国外上高中，甚至有些小学、初中都在国外读。而美国、加拿大、英国这些教育强国则是他们的首选国家。那么读美国高中，孩子需要具备什...
