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Introduction to magnetism: Wikipedia article that provides an overview of the concept.

In this lesson you will learn about:

• The concept of magnetism
• Be able to identify magnetic and non-magnetic materials
• Identify properties and types of magnets
• Understand that metals can be magnetised and de-magnetised
• Understand that magnets have a magnetic field
• Understand that the Earth has a magnetic field

Forces at a distance are explained by fields (gravitational, electric, and magnetic) permeating space that can transfer energy through space. Magnets or electric currents cause magnetic fields; electric charges or changing magnetic fields cause electric fields.

Magnetism is an interaction that allows certain kinds of objects, which are called ‘magnetic’ objects, to exert forces on each other without physically touching. A magnetic object is surrounded by a magnetic ‘field’ that gets weaker as one moves further away from the object. A second object can feel a magnetic force from the first object because it feels the magnetic field of the first object. The further away the objects are the weaker the magnetic force will be.

In this unit we will learn how these factors can affect the output of a simple machine. We will also learn about the difference between ideal mechanical advantage (IMA) and actual mechanical advantage (AMA), and how to apply your knowledge to calculate the efficiency of various simple machines.

In this online lesson you will learn how to compare measurements that have different units.

In this unit you will learn how to convert between common metric units of measure.

Outcomes

By the end of this course you will:

• Be familiar with the different metric units of length
• Be able to compute calculations involving metric units of length
• Be able to convert one metric unit of length to another

Outcome

By the end of this course you will:

• Be able to define what mass is
• Be familiar with the metric units of mass
• Understand how to compare different units of mass
• Be able to convert one unit of mass to another

An elaboration on how to use Newton's second law when dealing with multiple forces, forces in two dimensions, and diagonal forces.