Two surfaces interlock on a microscopic level with ridges and crevices
Gravitational field
The field that causes weight
Density
mass/volume
turbulence
Caused by shape of an object
Weight
Force you feel due to gravity
Work Done
Force x distance = Work Done or the energy input into a system
Hookes Law
For a spring the extension is proportional to the weight added
Contact Force
Forces where objects touch such as friction
Non-contact Force
Electrostatic, Gravitational, Magnetic which does not require surface contact and may pass through space.
Lesson Resources….
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.
GCSE Physics - Elasticity, spring constant, and Hooke's Law #44
This video covers: - The types of elasticity (compress, stretch & bending) [...]
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!
This video introduces friction and drag, two contact forces. Friction and [...]
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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Great video on Westminster Bridge, shows the of ripple waves, creating an [...]
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 #42
This video covers: - What a resultant force is - What 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
Moments | Forces & Motion | Physics | FuseSchool Think of a spanner [...]
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.
SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT.
VISIT us at http://www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you.
These videos can be used in a flipped classroom model or as a revision aid.
This is an Open Educational Resource. If you would like to use the video, please contact us: info@fuseschool.orgShow More
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Episode 8 Work
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Episode 11 The Inclined Plane
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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 [...]
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.
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 [...]
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 [...]
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 Science Revision Physics "Pressure in Fluids" (Triple)
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.
