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Introduction
Introduction
This topic takes your understanding of forces a stage further. We will look at the relationship between force and pressure.. You will find out about the huge amount of pressure we are on every day and look at how we can use this information to make rockets and ther useful machines.
But before you get started enjoy the song!
Task 1: Know
Task 1: Know
Use look, cover, write check to learn the answers to the core questions and the keywords for this topic
Learn
Learn
Task 2: What is pressure?
Task 2: What is pressure?
Task 2b: Read through the BBC Bitesize page then have a go at the quiz to check your understanding
Task 2c: Have a go at this experiment to understand the difference between force and pressure
Task 2d: Make notes that:
Give the units for:
Force
Area
Explain how to calculate the area of rectangle
Define pressure.
Give the unit for pressure
Give the formula for calculating pressure.
Explain why we can lie on a bed of nails without bleeding
Task 2e: A carpenter hammers a nail with a force of 45N with every stroke. The head of the nail has a surface area of 0.002m². How much pressure is exerted on the nailhead with each stroke?
F: Pressure = force / area
I: Pressure = 45/0.002
F: Not needed this time
A: 22,500Pa
Task 2f: A man with a weight of 800N stands on a lego brick with an area of 0.03m², what is the pressure?
F: Pressure = force / area
I: Pressure = 800/0.03
F: Not needed this time
A: 26,667Pa
Task 2g: Complete self mark the exam questions
Task 3: Pressure in fluids
Task 3: Pressure in fluids
Task 3b: Read through the BBC Bitesize page then have a go at the quiz to check your understanding
Task 3c: Make notes that
Define fluid.
Explain how fluids cause pressure on a surface.
Explain how pressure in a fluid changes as the depth increases.
Define atmospheric pressure.
Task 3d: Complete and self mark the exam question
Task 3e: Watch the video then:
Draw a diagram of this fountain.
Explain how the fountain works
Optional extension: Make your own version, how high can you get the jet to go?
Task 4: Floating and sinking
Task 4: Floating and sinking
Task 4b: Have a go at this experiment to understand the relationship between weight of water displaced and upthrust
Task 4c: Make notes that:
Name the forces that act on a floating object
Give the formula that shows the relationship between mass and weight.
Explain the relationship between weight of water displaced and upthrust on the object that is displacing the object.
Explain how we can use force diagrams (like the ones on slide 9) can be used to predict if objects will float or sink.
Task 4d: Complete and self mark the exam questions.
Task 5: Hydraulics
Task 5: Hydraulics
Task 5c: Make notes that:
Explain how incompressable liquds can be used to transmit forces using hydraulic systems
Write instructions explaining how to calculate the force tranmitted by a hydraulic system.
Task 5d: Complete the hydraulic calculations worksheet
Task 5e: Complete and mark the exam question
Task 6: Summary
Task 6: Summary
Task 6a Watch the video
Task 6b: Complete the Seneca leaning unit for this topic
Task 6c: Read through the 2 BBC Bitesize revision pages then have a go at the quiz.
Task 6d: Make a revision summary of this topic and add it to your revision folder.
Task 7: Check
Task 7: Check
Complete the end of unit quiz to make sure you have understood this topic - you will need a calculator.
Extend
Extend
Why not have a go at making your own hydraulic machine?
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