In this lesson, we will learn what forces are. We will also learn about contact forces and non-contact forces. Finally, we will test our knowledge with some application questions.
Unit Overview: Forces
- Explain that unsupported objects fall towards the Earth because of the force of gravity acting between the Earth and the falling object
- Identify the effects of air resistance, water resistance and friction, that act between moving surfaces
- Recognise that some mechanisms, including levers, pulleys and gears, allow a smaller force to have a greater effect.
In this lesson, we will learn how we can measure the size of forces, particularly how we can measure weight. We will learn about Isaac Newton and his contribution to our knowledge of forces as well as Newtons as a unit of measurement. We will also investigate how to use a Newton meter to measure forces.
In this lesson, we will learn about contact forces. We will discuss air and water resistance and examine what balance and unbalanced forces are. We will also investigate friction. Based on our investigation we will make conclusions about the causes and characteristics of friction.
In this lesson, we will recap the definition of non-contact forces. We will also investigate gravity and gravitational force and learn about Galileo by completing an investigation. Finally, we will learn about magnetic force, including some uses for magnets.
In this lesson, we will be discussing upthrust (or buoyancy) in more detail. We will discuss what density is and how it affects floating. We will also discuss the link between weight and upthrust. Finally, we will make some predictions which we will test.
In this lesson, we will first aim to understand the purpose of simple machines. We will then focus on gears, levers and pulleys to find out how they work and how they can be useful. We will also complete some questions throughout the lesson which will help us check our understanding.
Units in Science
- Practical skills
- Raw and synthetic materials
- Light & dark
- States of matter
- Rock cycle
- Human anatomy
- Electrical circuits
- Separating mixtures
- Physical and chemical changes
- Reproductive cycles
- Notable scientists
- Particles in physical and chemical changes
- Humans and animals over time
- Diet and lifestyle
- History of science