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Introduction
Introduction
Objects sometimes accelerate when a force acts on them. Forces can be split into 2 groups, contact forces and non-contact forces. In this unit you will learn how the forces acting on an object affect its movement and the different ways these forces can be shown in a diagram. You will also study scalar and vector quantities and the difference between them. In addition to this you will find out what is meant by the “centre of mass” of an object and how to find this on regular and irregular shapes. Higher tier students will also find a resultant force using a parallelogram and resolve a resultant force into two components. Set one students will also study moments, levers and gears.
Specification links:
Set 1 - Sections 4.5.1.1 - 4.5.6.2.3
Set2&3 - Sections 6.5.1.2 - 6.5.4.2.3
Task 1: Know
Task 1: Know
Task 1a: Use quizlet to help you learn the keywords and look cover, write check with the knowledge organiser and core questions to learn the key facts for this unit.
Task 1b: listen to the podcast to get an overview of this unit
Set 1
Set 2
Set3
Learn
Learn
Task 2: Vectors and scalars
Task 2: Vectors and scalars
Task 2c: Make notes that:
Define scalar, vector and magnitude.
Name 4 scalar quantities and 4 vector quantities
Explain how we can use arrows to represent vectors.
Complete the scale diagrams activity on slide 17
Explain the difference between distance and displacement and give an example.
Determine the scalars and vector quantities in this paragraph - Underline scalars and highlight vectors.
Task 2d: If you have a printer complete the worksheet
Task 2e: Complete the quiz
Task 3 - Forces between objects
Task 3 - Forces between objects
Task 3a: Watch the videos.
Task 3b: Read through the slides and the BBC Bitesize page
Task 3c: Make notes that:
List the things forces can do.
Name 3 contact forces and 3 non-contact forces.
Give Newton’s third law of motion
Define reaction force
Draw a plane and label all the action and reaction forces acting on it.
Complete the questions on slides 26, 27 and 28
Task 3d: Complete the BBC Bitesize forces quiz
Task 3e: Complete and self mark the exam questions
Task 4 - Resultant forces
Task 4 - Resultant forces
Task 4b: Make notes that:
Define resultant force.
Define equilibrium.
Describe the motion of an object if the forces are balanced.
Describe the motion of an object if the forces are unbalanced.
Draw a free body diagram of an object, labelling the forces and describe the object’s motion.
Task 4c: Complete the appropriate worksheet:
Task 4d: Complete and self mark the exam questions
Now move on to task 7
Now move on to task 7
Task 5 - Moments - Set 1 only
Task 5 - Moments - Set 1 only
Task 5a: Watch the videos
Task 5b: Read through the slides and the BBC Bitesize pages.
Task 5c: Make notes that:
Define moment
Define pivot
Describe how a moment can be increased
Give the equation for calculating moments
Give the principle of moments
Draw a diagram to show clockwise and anticlockwise moments
Task 5d: Answer and self mark the exam question
Task 5e: Complete the checkpoint quiz
Task 6 - Levers and gears - set 1 only
Task 6 - Levers and gears - set 1 only
Task 6b: Make notes that:
Explain why it is easier to move an object using a lever
Give a quantitative (involves numbers) example of this
Complete the example on slide 14
Explain what gears do
Give the equation which shows how the moments of a set of gears depends on their radii and number of teeth.
Complete the calculation on slide 22
Explain the difference between a high gear and low gear in a car and give the best use for each.
Task 6c: Complete the exam questions:
Task 6d: Complete the Bitesize quiz
Task 7 - Centre of mass - All sets
Task 7 - Centre of mass - All sets
Task 7b: Make notes that:
Define centre of mass.
Show how to find the centre of mass of a regular shaped object and give 3 examples.
Explain how to find the centre of mass of an irregular shaped object.
Task 7c: Complete and self mark exam questions. Sets 2&3 only need to do the first group.
Set 3 move on to task 10 now
Set 3 move on to task 10 now
Task 8: Parallelogram of forces - Set 1 & 2 only
Task 8: Parallelogram of forces - Set 1 & 2 only
Task 8b: Make notes that:
Explain what a resultant force is
Write a step-by-step method for drawing a parallelogram of forces
Draw a parallelogram of forces for each of the questions on slide 13 to determine the size and direction of the resultant force in each case.
Task 8c: Complete the exam question
Task 9: Resolution of forces - Set 1 & 2 only
Task 9: Resolution of forces - Set 1 & 2 only
Task 9b: Make notes that:
Describe how to resolve forces using the scale diagram method.
Describe how to resolve forces using the trigonometry.
Calculate the answer to this question using both the scale diagram and trigonometric methods.
Describe how to resolve the parallel and perpendicular components of weight of an object on a slope
Define equilibrium
Complete the question on slide 29
Task 9c: Complete the exam question
Task 10: Summary
Task 10: Summary
Task 10a: Complete the seneca learning unit for your set.
Task 10b: Make a mind map or single page revision summary of this topic and add it to your revision folder. Use the specification to help you:
Set 1 - Sections 4.5.1.1 - 4.5.6.2.3
Set2&3 - Sections 6.5.1.2 - 6.5.4.2.3
Task 11: Check
Task 11: Check
Extend
Extend
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