### What are Forces?

In this lesson we are introduced to forces. We learn about contact and non-contact forces, and the unit of force.

14 lessons

In this lesson we are introduced to forces. We learn about contact and non-contact forces, and the unit of force.

In this lesson we introduce balanced forces as forces of the same size in opposite directions. We also practice drawing free body diagrams.

In this lesson we learn what a resultant force is and how balanced or unbalanced force affect the motion of an object.

In this lesson we learn what gravity is, the difference between mass and weight, and how we can investigate mass and weight on earth.

In this lesson we will use an equation to calculate weight on different planets and explain why weight changes on different planets. We will also use the equation to calculate mass and gravitational field strength.

In this lesson we will learn about the scientist Avicenna, and how the theories of motion have developed.

In this lesson we will learn what pressure is, calculate pressure from an equation and apply this to everyday situations.

In this lesson we will investigate how the area of a parachute affects the speed it will drop at. We will formulate a hypothesis, carry out the investigation and describe the pattern.

In this lesson we will discuss the effect of frictional forces on speed and how design features can reduce these forces.

In this lesson we will use an equation to calculate the speed and learn about relative speed.

In this lesson we will use a distance-time graph to describe a journey, and draw a distance-time graph for a given journey.

In this lesson we will use the gradient of the distance time graph to calculate speed.

In this lesson we will revisit key forces content such as resultant force, gravity and weight.

In this lesson we will revisit key content such as pressure, calculating speed and distance-time graphs.

Units in Science

Units in Physics

- Particles
- Cells, tissues and organs
- Energy
- Reproduction and variation
- Chemical reactions
- Forces and motion
- Ecological relationships and classification
- Light and space
- Atoms and the periodic table
- Digestion and nutrition
- Electricity and magnetism
- Materials and the Earth
- Plants and photosynthesis
- Matter
- Forces in action
- Reactivity
- Energetics and rates
- Sound waves
- Biological systems and processes
- Cell biology (FT)
- Atomic structure and periodic table (FT)
- Particle Model of Matter (FT)