# Study guide

Welcome to the IB Physics study guide! As a rough guide, information in grey is introductory, blue is basic, yellow is more of a stretch, green is to prompt thinking and red is an examination tip.

#### 1 Measurement and uncertainties

Physics is all about deriving relationships between quantities so that we are able to make predictions. To derive relationships, we need to be able to measure the size of the quantities.A large ball of...

#### 2.1 Distance, displacement, speed and velocity

If you look up distance in a dictionary you will find it has many different meanings. It's the same for displacement. In physics, words mean one thing and one thing only; the meaning is specified clearly...

#### 2.1 Acceleration and motion equations

Acceleration is defined as the rate of change of velocity:If the velocity of a body changes then it has acceleration, regardless of whether it is slowing down or speeding up. This differs from everyday...

#### 2.1 Graphs of motion

A graph is a visual representation of the relationship between two quantities.If the graph is a straight line, the relationship is linear and the equation relating the quantities is of the form $$y = Ax + B$$...

#### 2.1 Projectiles

When a ball is thrown vertically it travels upwards while slowing down, then stops momentarily and then comes back down. If we take 'up' to be positive, the acceleration of the ball is negative both on...

#### 2.2 Forces

So far we have been dealing with movement. We can describe motion in terms of displacement, velocity and acceleration and solve problems using the 'suvat' equations provided acceleration is constant.

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