KS3 Forces and Pressure

Key Terms for Forces which you should learn….

Here are the resources from a series of 9 lessons for Y7/8 on Forces on pressure. It has a bit of everything in it so you have to really think about this unit. Also the video bank has some GCSE content in so if you cannot do it all we will recover it all in Y9-11 anyway. Watch them but don’t worry about some of the harder Maths it will take a while to master.

 (Pressure)

Lesson 1 Contact and Non Contact Forces

This is a part of a series of 9 lessons on forces and pressure.

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Lesson 1 Contact and Non Contact Forces

This is a part of a series of 9 lessons on forces and pressure.

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Lesson 2 Hookes Law

This is a part of a series of 9 lessons on forces and pressure.

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Lesson 4 Resultant Forces and Equilibrium

This is a part of a series of 9 lessons on forces and pressure.

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Lesson 5 Work Done

This is a part of a series of 9 lessons on forces and pressure.

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GCSE Physics Revision "Contact and Non-contact Forces"

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In this video, we look at what is meant by ...contact and non-contact forces. We then look at examples of these forces.

This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Physics. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.

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Tug of war
Kristen Wong
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Boat landing on water
Steve Hillebrand
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Skydiver
Robert Frola
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Tiffany Lamp
Shaun Donnelly

International Space Station
NASA
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Compasses around magnet
Nevit Dilmen
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Music credit: Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
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GCSE Physics - Elasticity, spring constant, and Hooke's Law

This video covers:
- The types of elasticity (compress, stretch & bending)
- The types of deformation (elastic & inelastic)
- Hooke's Law
- Idea of extension
- Spring constant
- Force-extension graphs

General info:
- ...Suitable for all GCSE and IGCSE courses
- Suitable for higher and foundation tiers
- Suitable for triple and combined science

Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Everything is relevant to your course!

Related videos/topics:

GCSE Chemistry playlist:
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Friction and Drag - GCSE Physics

This video introduces friction and drag, two contact forces. Friction and drag (also called air resistance or water resistance) can be explained with the particle model. These contact forces act ...between objects and can be both useful (like when a bike's tyres are gripping) or not so useful (like air resistance slowing you down).

Friction acts between two solids whereas drag acts between a solid and a fluid. We can reduce friction by lubricating the two objects which slightly separates them, allowing the two surfaces to glide more smoothly over each other. We can reduce drag by streamlining the solid object which reduces collisions with air or water particles, allowing the object to move more smoothly through the fluid.

Thanks for watching,

Lewis

Relevant for GCSE Physics 9-1 in the following exam boards:
AQA (including Trilogy)
Edexcel
CCEA
OCR A
OCR B
WJEC
CIE (Cambridge International Examinations) IGCSE
Edexcel International IGCSE

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Westminster Bridge London Eddy Currents

Great video on Westminster Bridge, shows the of ripple waves, creating an interference pattern on a bridge support.

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GCSE Physics - Resultant Forces & Free Body Diagrams

This video covers:
- What a resultant force is
- What free body diagrams are
- How to calculate the resultant force from a free body diagram
- The idea of ...splitting up the forces into horizontal and vertical components

General info:
- Suitable for all GCSE courses
- See below for whether it is higher or foundation tier for your exam board
- See below for whether it is triple or combined for your exam board

Exam board specific info:
AQA - Free body diagrams are higher tier only
IGCSE Edexcel - You don't need to know this content
Edexcel - Drawing and using free body diagrams is higher tier only
OCR 21st Century - Only need to be able to use scale diagrams if you're higher tier
OCR Gateway - Using free body diagrams is higher tier only

GCSE Chemistry playlist:
https://www.youtube.com/watch?v=fN8kH9Vvqo0&list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W

GCSE Biology Playlist:
https://www.youtube.com/watch?v=--dIBinUdeU&list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g

GCSE Physics Playlist:
https://www.youtube.com/watch?v=aHVJfRxeAxo&list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7Show More

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Moments | Forces & Motion | Physics | FuseSchool

Moments | Forces & Motion | Physics | FuseSchool

Think of a spanner loosening a fixed nut, or a child on a seesaw, or a door opening around a fixed hinge. ...All of these things are connected by something called moments…

A moment is the turning force around a fixed pivot. The pivot is the nut, or the middle of the seesaw, or the hinge. We can have one moment acting, which results in a turning force… Or if something is balanced, or in equilibrium, the moments are equal and opposite. To be balanced, this lighter child needs to sit further away from the pivot. And the heavier child needs to be closer. This is because the size of a moment is determined by the force and a distance.


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Episode 8 Work

Amazing Eureka Physics video series from 1 to 30 which through cartoon go through the amazing world of KS3 to A-Level Physics teaching with key concepts.

First released in Canada but ...still going strong!Show More

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Episode 11 The Inclined Plane

Amazing Eureka Physics video series from 1 to 30 which through cartoon go through the amazing world of KS3 to A-Level Physics teaching with key concepts.

First released in Canada but ...still going strong!Show More

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Pressure, Force and Area - Simple physics tutorial (GCSE)

In this video, we recap what 'pressure' is - and look more in-depth at how changes in area can affect how much pressure a force can apply by delving into ...a couple of simple calculations.

The written tutorial is available here: https://www.ninetyeast.net/physics/grade-9-10-gcse-hsc/forces/different-types-of-forces/contact-forces/pressure


We hope you enjoy the video and tutorial! If you do, please like and share it, and let me know in the comments below. If you're in a position to do so, please consider becoming a Patreon (https://www.patreon.com/ninetyeast) - anything you can donate really helps to not only support future tutorials, but gives me such encouragement, knowing that someone values the work I'm doing.Show More

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Water Bubbles and Diving Pressure

This amazing video shows how a water bubble is under pressure at the bottom of a measuring cylinder.

Dimensions Cylinder - 570mm tall x 80mm diameter.

So you can time the ...rise if you work it out as a proportion of the cylinder.

Due to the increase in pressure the volume of air reduces in your tank and lungs when you dive. When you exhale from your regulator at depth that air is then exposed to pressure and as the air travels to the surface it will be exposed to less pressure so will your bubbles increase in size all the way to the surface.
If you hold onto your air it will expand inside your body and cause you damage!

This is called the "bends", the only way is to have breathing stops every few metres to exhale and exchange the dissolved gases.Show More

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Water Bubbles and Diving Pressure Slow Motion

This amazing video shows how a water bubble is under pressure at the bottom of a measuring cylinder.

Dimensions Cylinder - 570mm tall x 80mm diameter.

So you can time the ...rise if you work it out as a proportion of the cylinder.

Due to the increase in pressure the volume of air reduces in your tank and lungs when you dive. When you exhale from your regulator at depth that air is then exposed to pressure and as the air travels to the surface it will be exposed to less pressure so will your bubbles increase in size all the way to the surface.
If you hold onto your air it will expand inside your body and cause you damage!

This is called the "bends", the only way is to have breathing stops every few metres to exhale and exchange the dissolved gases.Show More

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GCSE Physics Revision "Pressure in Fluids" (Triple)

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Teachers, to get PLUS for your school, email schools@freesciencelessons.co.uk

In this video, we look at how to calculate the ...pressure of fluid acting at a surface. We then explore what is meant by atmospheric pressure.

This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Physics. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.

Image credits: https://creativecommons.org/licenses/by/2.0/uk/

Ernest Rutherford
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Ernest Marsden
S P Andrew Ltd (1921)
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Crisp packet on airplane
Edoddridge
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Atmosphere
NASA
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Mountaineer
Sanjay Kodain
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Hydraulics in Action

Simple model to show how hydraulics work

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Derby County Show Digger Exhibition - Hydraulics in Action - JCB

This is great little video which shows the power of hydraulics in action. Amazing British construction.

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Hydraulics | GCSE Physics | Doodle Science

GCSE Science

Doodle Science teaches you high school physics in a less boring way in almost no time!

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Script:

Hydraulics might sound complicated but all they ...are, is another force multiplier. They utilise the fact that liquids are virtually incompressible, which means when you compress them, the pressure you apply to one point of the liquid is transmitted equally in all directions.

For example if you have a balloon with a few holes in it and you squeeze the top of the balloon, the water will squirt out of all of the holes. This shows that the pressure applied at the top of the balloon must have been transmitted equally to all other parts of the liquid.

In order to work with hydraulics, the equation Pressure = Force/ Cross sectional area is needed. Where pressure is measured in Pascals, force in newtons and the cross sectional area in square metres. A hydraulic system works by applying a small force to one piston to produce a much larger force to a second piston. For example, if one piston has a cross sectional area of 0.001m^2 and a force of 15N is applied to it, then since the pressure is transmitted equally to the other piston of area 0.01m^2 then the force acting on the second piston is 150N

Hydraulic systems are used in all kinds of things such as car braking systems, car jacks and on the landing gear of some aircraft. All these applications take a small effort force and produce a large load. And it’s a good job too, because I wouldn’t want to change a tyre without hydraulics.

References:
1. http://www.bbc.co.uk/education/subjects/zrkw2hv
2. CGP GCSE Physics AQA Revision Guide.Show More

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Pressure on a Plane Bag of Crisps

Interesting effect when the pressure in a plane cabin drops below air pressure a normal bag of crisps inflates to be turgid. Here is one pack of crisps bought at ...Kos airport which has now gone very turgid.Show More

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Plane Cabin Pressure Pringles Can

Amazing look at how pressure on a plane is less than or is on the ground. 40,000 feet makes a difference.

This was a Ryan air plane!

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What is Pressure? | Physics | Don't Memorise

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Do we know the real meaning of Pressure? When does Pressure increase or decrease? What is it dependent on? Watch this video to know more.

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In this video, we will learn:
0:00 Introduction
1:06 What is Pressure?
1:17 Unit of Force
1:35 Why unit of Force is called Pascal?
1:50 Relation between Pressure & the Area on which the Force is Applied

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Do Liquids Exert Pressure? | Physics | Don't Memorise

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Do liquids also exert Pressure? Watch this video to know more.

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In this video, we will learn:
0:00 Introduction
0:17 Do Liquids Exert Pressure?

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Atmospheric Pressure | Force and Pressure | Infinity Learn

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In this video, we will learn:
0:00 Atmosphere
0:19 Liquid Pressure
1:23 Air Pressure or Atmospheric Pressure
1:41 Layers of Atmosphere
2:44 Graph of Pressure in various Layers of Atmosphere
3:17 Atmospheric Pressure (Examples)

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Quick Test for Pressure…