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. 
Displacement, Velocity,Speed, Instantaneous Speed, Speed Acceleration, Gradient.
You should:
(a) define displacement, instantaneous speed, average speed, velocity and acceleration;
(b) select and use the relationships average speed = distance / time
acceleration = change in velocity / time to solve problems;
(c) apply graphical methods to represent displacement, speed, velocity and acceleration;
(d) determine velocity from the gradient of a displacement against time graph;
(e) determine displacement from the area under a velocity against time graph;
(f) determine acceleration from the gradient of a velocity against time graph.
Watch the video at the top of the page.
Read through the following notes:
Imagine a rollercoaster ride with a track shaped as below:
At different points along the track, the rollercoaster would have different velocities and therefore its acceleration would be changing – it would not be constant (or uniform – in fact it would be nonuniform.
Look at the graphs below:
A
To find the velocity from a displacementtime graph we have seen that we take the gradient of the line. But if the acceleration is nonuniform it is, by definition, changing. So we can only work out the acceleration at specific points, or instants. We call this taking the instantaneous acceleration.
Graph A shows the VT graph of an object with nonuniform acceleration. To work out the instantaneous acceleration we must work out the gradient of the line at that point. In order to do this we must draw a tangent (a line parallel with the direction of the graph at that point) and take the gradient of that line in the normal way. (change in ycoordinates/change in xcoordinates) Δv/Δt.
We can also find the displacement from a VT graph from the area under the graph (s=vt) but for nonuniform acceleration this is slightly harder as we have to count the squares under the graph since the velocity is changing with changing acceleration.
B
Look at the graph of motion with uniform acceleration. By finding the area under this graph we can derive another useful equation for uniformly accelerated motion – because the area under a velocity–time graph is equal to the displacement:
area of rectangle = initial velocity × time interval
area of rectangle = uΔt
area of triangle = ½ × base × height
area of triangle = ½ Δt × (v  u)
You know that:
(v – u) = a Δt
so area of triangle = ½ a Δt^{2}
and displacement = area of rectangle + area of triangle
Δs = uΔt + ½ a Δt^{2}
Usually you will see this equation written using just t (not Δt) to represent the overall time taken and s to represent the overall displacement:
s = ut + ½ at^{2}
Use the equations that have you already met to show that:
v^{2} = u^{2} + 2as(Hint: substitute for t)
For a printable version of these notes click here.
Follow the link to some questions to develop your understanding of using velocitytime graphs.
Have a go at this quiz that will check your understanding:
Don't move on until you have correctly answered all the multiple choice questions and understand why they are correct:
If you would rather look at this site in a separate window, then follow the link: acceleration (http://www.cbbs.org/physics11/accelc.htm )
You should check through these outcomes. If there is anything you can't do, check through the page again before you do your homework.
(c) apply graphical methods to represent displacement, speed, velocity and acceleration;
(d) determine velocity from the gradient of a displacement against time graph;
(e) determine displacement from the area under a velocity against time graph;
(f) determine acceleration from the gradient of a velocity against time graph.
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.