CLICK HERE TO SEE ALL LESSONS  
Lesson 1 Physical Quantities+UnitsMotion: What Physical Quantites are and what units go with them.Using Numerical Prefixes. 

Lesson 2  Vectors and ScalarsMotion: What Vectors and Scalars are and examples of them. 

Lesson 3  Vector AdditionMotion: Adding Vectors in 2 dimensions and using Pythagoras' Theorem to find the size of the resultant. 

Lesson 4  Components of a vectorMotion: Finding the components of a resultant vector by using trigonometry. 

Lesson 5  Gatso Speed CamerasMotion: HOW SCIENCE WORKS.How GATSO Speed cameras work. 

Lesson 6Displacement Time GraphsMotion: Defining displacement and using displacementtime graphs to describe motion. 

Lesson 7  Velocity Time GraphsMotion: Defining velocity and using velocitytime graphs to describe motion. 

Lesson 8  Motion Graphs ReviewMotion: Using displacementtime and velocitytime graphs to find velocity, acceleration and displacement. 

Lesson 9  Uniform AccelerationMotion: Deriving the equations of motion (suvat equations) and using them. 

Lesson 10  Motion under GravityMotion: Practical use of the equations of motion. Describing an experiment to find acceleration due to gravity. 

Lesson 11  Projectiles introMotion: What a projectile is and what path one follows. 

Lesson 12  Projectiles challengeMotion: Applying the equations of motion to projectile motion. 

Lesson 13  Projectiles PractiseMotion: Applying the equations of motion to projectile motion. 

Lesson 14  G481.1 Module ReviewMotion: Test yourself on Motion. 

Lesson 15  Newton's 2nd LawForces in action: Using Newton's 2nd Law and defining the Newton. 

Lesson 16  Newton 2 practiseForces in action: Questions using Newton's 2nd Law. 

Lesson 17  NonLinear MotionForces in action: Describing the motion of projectiles travelling in a fluid. 

Lesson 18  Equilibrium DefinitionsForces in action: Describing equilibrium and using the triangle of forces. 

Lesson 19  Moments and CouplesForces in action: Describing moments and couples. 

Lesson 20  Equilibrium ExamplesForces in action: Using the principle of moments to do questions involving practical situations. 

Lesson 21  Density and PressureForces in action: Describing density and pressure and their units. 

Lesson 22  Forces on VehiclesForces in action: Describing the factors that affect stopping distance. 

Lesson 23Physics of vehicles introForces in action: Describing how air bags, seat belts and crumple zones work and looking at how GPS works. 

Lesson 24  Physics of vehiclesForces in action: Describing how forces are reduced by using air bags, seat belts and crumple zones. 

Lesson 25  G481.2 ReviewForces in action: Test yourself on Forces in action. 

Lesson 26  Work and energyWork and Energy: Defining work done and the Joule and using the equation. 

Lesson 27  Energy ChangesWork and Energy: Defining the conservation of energy and describing some examples. 

Lesson 28  GPE to KEWork and Energy: Describing the interchange between gravitational potential energy and kinetic energy using equations. 

Lesson 29  PowerWork and Energy: Describing power and the Watt. 

Lesson 30  EfficiencyWork and Energy: Describing energy efficiency. 

Lesson 31  Spring ConstantWork and Energy: Looking at elastic materials and using Hooke's Law. 

Lesson 32  Strain EnergyWork and Energy: Describing the energy stored in elastic materials. 

Lesson 33  Young ModulusWork and Energy: Describing Stress and Strain of materials, the definition of the Young Modulus and describing experiments to find it. 

Lesson 34  Material PropertiesWork and Energy: Defining the terms elastic deformation and plastic deformation of a material. Looking at stress strain graphs for ductile, brittle and polymeric materials. 

Lesson 35  G481 ReviewWork and Energy: Test yourself on Work and Energy. 
Scalar, Displacement, Vector, Force, Velocity, Resultant, Perpendicular
You should:
(d) resolve a vector such as displacement, velocity and force into two perpendicular components.
Watch the video at the top of the page about vector addition.
Read through these notes on Vectors components.
Resolving a vector is the process of taking the resultant vector and working out its magnitude in two perpendicular directions.
The easiest way to understand this is with an example:
A ball is kicked at 10 ms1 at an angle of 30° to the horizontal. What are the horizontal and vertical components of its velocity?
The vector triangle would look like this:
From our knowledge of Trigonometry we can say that:
sin30°= Vv / 10 ms^{1}
And
cos30°= Vh / 10 ms^{1}
(Don’t forget soh, cah (and toa))
So we could rearrange these to get:
Vv = 10 sin30°
And
Vh = 10 cos30°
So in this case Vv = 5 ms^{1} and Vh = 8.7ms^{1}
Remember that the hypotenuse is 10 and this is the longest side, so if either of your components is bigger than 10 then you know you’ve done something wrong.
Imagine trying to move a toy car by pushing it.
If you wanted to move it to the right you would push it from the left:
If you wanted to move it up you would pull it from the top:
You can see that no matter how hard you pushed it from the left, the car would never go upwards. And the same is true that no matter how hard you pulled the car up, it would never go left or right.
These vectors (perpendicular ones) are independent of each other and can be treated individually when doing calculations. This becomes very important when looking at projectile motion in lesson 23.
For a printable version of these notes click here.
Work through the powerpoint. You'll need some graph paper, a ruler, pencil and a calculator.
Read through this example and then try the question below:
You set off to run across as empty supermarket parking strip, 100 m wide. You set off at 55° to the verge, heading towards the entrance to the supermarket. Your speed is 8 m s^{1}. How long will it take you to reach the far entrance?
Find the component of your velocity directly across the parking strip. The angle between your velocity and the direction of interest is 35° (why?). So:
component of velocity across the parking strip = v × cos q = 8 m s–1 × cos 35° = 6.55 m s^{1}.
Find the time it will take to travel 100 m at this speed:
You will reach the far side of the parking strip in a little more than 15 s.
Notice that calculating the time only involves the component of velocity directly across the parking strip. You can go on to calculate how far along the opposite side of the parking strip you will arrive.
Find the component of your velocity along the parking strip. The angle between your velocity and the direction of interest is 55°. So:
component of velocity across the parking strip = v × cos q = 8 m s^{1}× cos 55° = 4.59 m s^{1}.
Find the distance travelled at this speed in 15.3 s:
distance = speed × time = 4.59 m s^{1} × 15.3 s = 70.2m
So you will finish up about 70 m further along the parking strip. Notice that this calculation only involves the component of velocity along the parking strip.
A train is gradually travelling up a long gradient. The speed of the train is 20 m s^{1} and the slope makes an angle of 2° with the horizontal. The summit is 200 m above the starting level. How long will it take to reach the summit?
click here for the answer.
You should check through these outcomes. If there is anything you can't do, check through the page again before you do your homework.
(d) resolve a vector such as displacement, velocity and force into two perpendicular components.
Now print out the Exam Questions and try them. These are the same standard as the questions you will get in your exam. As you get close to taking the exam, you should try to answer these so that it takes you 1 minute to get through a 1 mark question.
Below is a very rough guide to what grade you will achieve for the percentage gained.
% 
Grade 
80^{} 
A 
70 
B 
60 
C 
50 
D 
40 
E 
Check with your teacher to find out what your target grade is based on how you did at key stage 4 but remeber some topics are easier than others and so it is the overall average that really counts.