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...
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...
What are Scalar & Vector Quantities? A?scalar?is a?quantity?which?only?has a magnitude (size) A?vector?is a quantity which has?both?a magnitude and a direction For example, if a person goes on ...
Homogeneity of Physical Equations An important skill is to be able to check the?homogeneity?of physical equations using the SI base units The units on either side of the equation should be the same...
