# Start here!

# How do computers simulate the motion of virtual particles?

In this lesson we'll explore how we use fairly simple physics to draw particles which move according to the forces we feel in the real world (such as wind & gravity)

We will cover how to draw (and add) forces which act on virtual particles using vectors.

Then we'll explore the relationship between the

**net force**on a particle and the**resulting acceleration**thanks to Newton's second law of motion.Finally we'll show you how to calculate the motion of a particle, frame by frame.

After that you'll have all the tools you need to try programming your first particle simulator.

# What do I need to know before starting?

- This lesson is appropriate for grades 7+
- To reach the end of this lesson should be comfortable solving linear equations by substitution.
- We'll use vectors in this lesson but nothing beyond vector addition and subtraction.