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#### Motion

This is all about how objects move.

###### Speed, Velocity and Acceleration

No stick insects were harmed in the making of this video. If you want to find out more about their asexual reproduction please have a look at Wikipedia.

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###### Distance-Time and Speed-Time Graphs

A way to visualise the motion of an object.

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###### Displacement-Time and Velocity-Time Graphs

Developing your GCSE knowledge of distance-time and speed-time graphs with your new knowledge of their vector equivalents.

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###### Tricky Points on s-t and v-t Graphs

In this video I recap a few of the essential things you need to understand about displacement-time and velocity-time graphs, including the significance of the gradient and area.

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###### 'suvat' Equations of Motion

These equations are essential for describing the world around us and the motion of objects. May I introduce the 'suvat' equations!

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###### Deriving the 'suvat' Equations

You know the equations of motion, but where do they come from? This video shows how you can use a simple velocity-time graph to derive four 'suvat' equations. Remember the gradient is equal to the acceleration and the area is equal to the displacement.

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###### Solving 'suvat' Equations

How can you solve real problems with the 'suvat' equations? This video shows you a technique that will guarantee you the correct answer every time.

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###### Stopping, Thinking and Braking Distance

Stop! What affects how far it takes to stop a vehicle? What is the difference between thinking and braking distance? Watch this to find out a bit more and refresh your knowledge from GCSE.

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###### Car Safety Features

There are many features on a car that allow it to be safer for the occupants in the event of a collision. A lot of these rely on the principle that if you increase the collision time you reduce the force involved.

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###### Projectile Motion (Part I)

Don't worry - it's not real! This is just one example of projectile motion and a way that you can solve equations where an object is initially travelling horizontally. Remember the vertical component of velocity is independent of its horizontal component so it accelerates vertically but not horizontally.

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###### Projectile Motion (Part II)

Indirect fire (provided by the finest regiment in the British Army - the Royal Artillery) is the example I used in this video. When you have a projectile fired at at an angle (it initially has both horizontal and vertical components of velocity) it will follow a parabolic path. This video shows how you can solve such problems using simple 'suvat' equations.

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###### Projectile Motion (Part III)

This is a rather long example with a projectile fired at an angle from a raised platform. I show you how to break up the motion of the projectile into three sections then use suvat for both the horizontal and vertical components of velocity.

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###### The Monkey and Hunter Example

This is a classic experiment, and you can often see a demo of it in the lab. A hunter fires a projectile at a monkey that drops from the branch as soon as it hears the sounds. Where should the hunter aim? Up, level or down?

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