IB DP Physics: HL復(fù)習(xí)筆記2.1.2 Speed & Velocity
Speed & Velocity Speed The?speed?of an object is the distance it travels every second Speed is a?scalar?quantity This is because it only contains a magnitude (without a direction) The?average s...
IB DP Physics: HL復(fù)習(xí)筆記2.1.1 Distance & Displacement
Distance & Displacement Distance?is a measure of how far an object travels It is a?scalar quantity - in other words, the direction is not important The athletes run a total distance of 300 m Co...
IB DP Physics: HL復(fù)習(xí)筆記1.3.3 Solving Vector Problems
Solving Vector Problems In physics, vectors appear in many different topic areas Specifically, vectors are often?combined?and?resolved?to solve problems when considering motion, forces, and momentu...
IB DP Physics: HL復(fù)習(xí)筆記1.3.2 Combining & Resolving Vectors
Combining & Resolving Vectors Vectors?are represented by an arrow The?arrowhead?indicates the?direction?of the vector The?length?of the arrow represents the?magnitude Combining Vectors Vectors ...
IB DP Physics: HL復(fù)習(xí)筆記1.3.1 Vector & Scalar Quantities
Vector & Scalar 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 a hike in ...
IB DP Physics: HL復(fù)習(xí)筆記1.2.3 Determining Uncertainties from Graphs
Error Bars The uncertainty in a measurement can be shown on a graph as an?error bar This bar is drawn above and below the point (or from side to side) and shows the?uncertainty?in that measurement ...
IB DP Physics: HL復(fù)習(xí)筆記1.2.2 Calculating Uncertainties
Uncertainties Precision Precise measurements are ones in which there is?very little spread?about the?mean?value, in other words,?how close?the measured values are?to each other If a measurement is ...
IB DP Physics: HL復(fù)習(xí)筆記1.2.1 Random & Systematic Errors
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 as t...
IB DP Physics: HL復(fù)習(xí)筆記1.1.3 Estimating Physical Quantities
Orders of Magnitude When a number is expressed in an?order of 10, this is an?order of magnitude. Example: If a number is described as 3 × 108?then that number is actually 3 × 100 000 000 The?order ...
