### Force and Motion

Here are four video lessons on force and motion all of which overlap earlier work but are applied at advanced level and which are likely to benefit from revision.

**Using the equations of motion**

This is a fairly old and a simply produced video introducing the equations of motion and running through three examples using each of the three equations in turn.

**The independence of vertical and horizontal motion**

It is hard to believe that a bullet fired from a rifle falls to the ground exactly as quickly as one simply dropped from the same height. This video seeks to explain, without the rifle but with practical demonstrations you can easily repeat, that vertical motion is completely independent of any horizontal movement.

**Impulse and Momentum**The momentum of an object is the product of the mass multiplied by the velocity. If we examine the force that creates that movement or the force needed to stop it we find that the change of momentum is equal to the product of (average) force multiplied by the time that force is applied. This connection gives us a tool to calculate the forces in collisions and this is shown with a simple repeatable demonstration in this video.

Explaining what the **moment of a force is and of The Law of Moments** with simple everyday examples and applications. This is an introduction to the idea of "moments" and to the Law of Moments. The examples are confined to one clockwise and one anticlockwise force.

Illustrated notes which you are free to copy are on four separate pages on

Details of physics video lessons on flash drive including many more on force and motion **are available here.**