Gradient of a Velocity-Time Graph Acceleration is any change in the velocity of an object in a given time As velocity is a vector quantity, this means that if the speed of an object changes, or its...
Gradient of a Displacement-Time Graph Displacement-time graphs show the changing position of an object in motion They also show whether an object is moving forwards (positive displacement) or backw...
Area under a Velocity-Time Graph Velocity-time graphs show the speed and direction of an object in motion over a specific period of time The area under a velocity-time graph is equal to the displac...
Motion Graphs Three types of graph that can represent motion are displacement-time graphs, velocity-time graphs and acceleration-time graphs On a displacement-time graph… slope equals velocity the ...
Defining Displacement, Velocity & Acceleration Scalar quantities Remember scalar quantities only have a magnitude (size) Distance: the total length between two points Speed: the total distance ...
Measurement Techniques Common instruments used in Physics are: Metre rules - to measure distance and length Balances - to measure mass Protractors - to measure angles Stopwatches - to measure time ...
Calculating Uncertainty There is always a degree of uncertainty when measurements are taken; the uncertainty can be thought of as the difference between the actual reading taken (caused by the equi...
近日，“2022软科世界大学学术排名”最新发布，排名展示了全球领先的1000所研究型大学。 中国内地共有163所大学上榜，其中8所位列世界百强，比去年增加1所。清华大学表现最佳，排名全球第26，较去年上升2名；北京大...
Random & Systematic Errors Measurements of quantities are made with the aim of finding the true value of that quantity In reality, it is impossible to obtain the true value of any quantity, the...
