Y8 FORCES booklet- Contact Forces & Pressure
Year 8 Science: Forces – Contact Forces and Pressure
Page 1: Course Overview
Topics Covered:
Friction and Drag
Friction and Motion
Drag and Motion
Squashing and Stretching
Hooke’s Law
Pressure in Solids
Pressure in Fluids
Pressure in Gases
Class Information:
Name, Class, Teacher, Room
Motto: "Together towards our Lord, through learning, love and faith"
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Page 2: Laboratory Safety Rules
Key Rules:
Do not use equipment without proper knowledge.
Follow safety instructions from teachers.
Never work in the lab without a teacher.
Wear safety goggles during practical work.
Clean spills immediately and check for special instructions.
Tie back long hair and remove dangling jewelry.
Do not place anything near your lips in the lab.
Wash chemicals off skin immediately.
No messing around in the lab.
Never point a test tube at anyone.
Do not dispose of chemicals in the sink without permission.
Keep personal items off the lab floor.
Acknowledgment: Sign and date to confirm understanding.
Page 3: Booklet Expectations and Feedback
Writing Expectations:
Use blue or black ink only.
Write the date when starting a new objective.
Draw diagrams with a pencil.
Avoid graffiti.
Mark work in red pen, corrections should also be in red.
Use a ruler for mistakes.
Do not rip pages from the booklet.
Keep work neat.
Feedback Process:
Consistent modeling by teacher.
Document answers in red pen.
Page 4: Key Terms in Forces
Contact Forces:
Forces that act between objects that are in direct contact.
Balanced Forces:
When two equal forces act on an object in opposite directions.
Unbalanced Forces:
When forces acting on an object are not equal, causing movement.
Resultant Force:
The overall force acting on an object.
Page 5: Understanding Friction
Demonstration Observations:
Interlaced catalogues resist being pulled apart.
Observe the effect of rubbing hands together on thought processes.
Resources:
PHET Simulation on friction.
Video demonstration reference: A Demonstration of Friction | Physics – Bitesize Science.
Page 6: Friction Description Activity
Task: In your own words describe what makes friction.
Page 7: Analyzing Friction Statements
Evaluation: Tick statements that match your opinion on friction's effects.
Statements on friction slowing down objects and pushing in opposite directions.
Identification of Friction Locations:
Between feet and road, hands and car, moving metal parts, tires and road.
Page 8: Understanding Drag
Definition of Drag:
A force that slows down objects moving through fluids (air/water).
Examples of Drag Forces:
Water resistance experienced by dolphins/surfers.
Air resistance encountered by skiers.
Investigation Preparation:
Equipment needed: wooden block, Newton meter, various surfaces.
Page 9: Investigation Discovery
Variables: Identify independent and dependent variables for the investigation.
Results Table Construction: Draw results table.
Control Variables: List control variables in the investigation.
Page 10: Observing Experiment Issues
Reflection on Problems: Describe problems affecting experimental results.
Diagram Illustration Space: Draw diagrams of friction and drag forces effects below.
Page 11: Analyzing Forces in Motion
Sledge Experiment Tasks: Draw arrows showing direction and labels of forces.
Friction Comparison: Discuss reasons for different frictions on snow vs concrete.
Page 12: Car Motion Forces
Identify Forces Affecting Cars in Movement:
Explain the impact of air resistance and the forward force on a car’s motion.
Page 13: Lesson Aim - Friction and Motion
Outcomes:
Describe and explain effects of friction on movement.
Identify ways to reduce friction.
Key Definitions:
Resultant force, Fluid, particle movement in liquids, standard unit of weight.
Friction's Role:
Opposes sliding, affects speed and motion.
Page 14: Class Discussion Questions
Collaborative Discussion Points:
Identify errors in peers' concepts of friction; prepare supportive feedback.
Page 15: Testing Friction Methodology
Practical Activity on Friction:
Use a 100g slotted mass and measure distances.
Change liquid types and predict effects on stopping distance.
Page 16: Lesson Aim - Drag and Motion
Objectives:
Describe drag effects on movement.
Understand resultant force implications.
Explore drag reduction methods.
New Knowledge Topics:
Pressure relationships in fluids and inter-relationships with force.
Page 17: Understanding Personal Experiences with Drag
Experience with Roller Coasters & Cycling:
Discuss drag implications on high-speed activities.
Page 18: Ball Bearings Investigation
Experiment with Viscous Liquid:
Analyze time taken for ball-bearings to reach markers in glycerol.
Explore terminal velocity understanding.
Page 19: Practical Parachute Investigation
Methodology Overview:
Create paper tray parachutes; time falls for analysis.
Page 20: Predict and Record Results
Prediction Tasks:
Discuss fall times for different sized trays.
Page 21: Surface Area and Volume Ratios
Calculating Ratios:
Explore relationship between surface area, volume ratios, and fall times.
Page 22: Chain Forces and Motion
Force Analysis on Chains:
Compare weight and friction as chains slide off the table.
Page 23: Forces on a Sliding Chute
Interaction of Forces:
Identify forces acting on Anil while he slides.
Page 24: Introduction to Squashing and Stretching
Objectives:
Explore forces causing deformation in objects.
Key Concepts: Compression and Tension:
Reviewing effects of squashing and stretching on objects.
Page 25: Response of Solids
Solid Properties:
Discuss reaction forces in a supportive structure.
Page 26: Results Tables Preparation
Results Tables:
Simple design for experiments with independent/dependent variables.
Page 27-28: Measure Material Extensions
Test Elastic Materials:
Relate material extensions to applied forces.
Page 29-30: Fair Test of Cardboard Bridges
Joe's Bridge Test Results:
Analyzing outcomes based on mass added and distance measurements.
Page 31: Hooke’s Law Overview
Definition:
States linear relationship of force and extension in springs.
Page 32: Hooke's Law Investigation Guidelines
Practical Guidelines:
Simulate Hooke's Law with real-world applications.
Page 33: Graphing Results Tasks
Graphing Instructions:
Proper graphing techniques using SALT approach.
Page 34-36: Homework and Review Activity
Comprehensive Assessment:
Apply learning objectives of Hooke’s law and practical implications.
Page 37: Understanding Pressure in Solids
Defining Pressure:
Discuss factors affecting pressure and calculations.
Page 38-41: Factors and Calculations of Pressure
Pressure Dependency:
Relate force, area size, and calculations.
Page 42-44: Practical Context of Pressure Applications
Real-World Situations of Pressure Analysis:
Discuss various examples of pressure ramifications.
Page 45: Pressure in Fluids Overview
Fluid Dynamics and Pressure:
How pressure changes with depth in fluids.
Page 46-49: Experiments and Observations with Fluids
Conducting Fluid Pressure Activities:
Focus on gaseous interactions and their implications.
Page 50: Floating and Sinking Principles
Understanding Upthrust:
Discuss weight balance in fluid to achieve floating motion.
Page 51-53: Practical Exercises with Pressure Dynamics
Hands-on Activities:
Conduct interactive tasks to visualize gas behavior.
Page 54-56: Summary of Gas Behavior Observations
Key Learning in Gas Dynamics:
Illustrate pressure dynamics dependency on temperature and volume.
Page 57-58: Final Observations and Group Discussions
Discussion on Air Behavior Under Changes:
Proposition of pressure changes regarding air and gas treatments.
Page 59: Collaborative Experiment Analysis
Discuss Findings:
Write observations and conclusion notes on conducted experiments.
Page 60: Analyzing Tire Pressures and Forces
Tire Pressure Calculations:
Explore relationships of pressure with area and force.
Page 61: Analyzing Gases with a Piston Setup
Piston Functionality:
Explain effects of gas compression via piston manipulation.
Page 62: Glossary of Terms
Key terms: Air Resistance, Balanced Forces, Compress, Contact Forces, and more to better understand forces dynamics.
Page 63: Science Glossary Continuation
Extend understanding of forces, pressure calculations, Hooke's Law, and other relevant terms.
Page 67: Calculation Setup for Science Activities
LUCE SRAY Methodology:
Methodological framework for scientific calculations.