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In this lesson you will learn about:

1. The decimal number system.
2. Converting fractions to decimals.
3. Calculations with decimals.
4. Percentages.

This video explores how to convert fractions to a decimal with tenths, hundredths and thousandths.

This online activity provides exercises on dividing decimals by decimals.

A force diagram is a useful tool to help us visualise forces acting on an object and gives us informa- tion about the object’s motion. We often use force diagrams when solving calculations involving the forces acting on an object.

• Predict, qualitatively, how an external force will affect the speed and direction of an object's motion.
• Explain the effects with the help of a free body diagram.
• Use free body diagrams to draw position, velocity, acceleration and force graphs and vice versa.
• Explain how the graphs relate to one another.
• Given a scenario or a graph, sketch all four graphs.

Explore the various forces acting on a block sitting on an inclined plane. Learn how to break the force of gravity into two components - one perpendicular to the ramp and one parallel to the ramp. Finally, using geometry and trigonometry, learn how to calculate the magnitude of each component of force that is acting on the block.

Instantaneous speed is a measurement of how fast an object is moving at that particular moment. Instantaneous velocity is a vector quantity that includes both the speed and the direction in which the object is moving. Learn how to find an object’s instantaneous speed or velocity in three ways - by using calculus, by looking at the slope of a given point on a graph of an object’s rate vs. time, or by using kinematic formulas if the object’s acceleration is constant. 

You want a projectile to fly as far as possible, at which angle should you launch it? We'll start with formulas for the initial velocity.

This online activity provides you with exercises on ordering decimals.

Figuring out the horizontal displacement for a projectile launched at an angle.