Embedded Files
Introduction
Introduction
Forces are all around us. We will be looking at what they are, what they can do and how they affect the movement of objects.
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 a force?
Task 2: What is a force?
Task 3: Measuring forces and force diagrams
Task 3: Measuring forces and force diagrams
Draw force diagrams to the forces acting on:
The paperclip in picture 1
The cork in picture 2
Picture 1
Picture 2
Task 4: Resultant forces and equilibrium
Task 4: Resultant forces and equilibrium
Task 4b: Make notes that:
Define balanced forces
Define unbalanced (resultant) force
Complete the how much is left over question below. (check your answers on slide 100)
Calculate the size of the resultant force acting on the objects below and describe the effect this will have on their motion.
Picture 3
0N - it will stay still
Picture 4
18N to the right - it will accelerate to the right
Picture 5
0N - it will keep flying in the same direction at the same speed
Task 4c: Complete the worksheet.
Click the arrow to check your answers
Task 1
Weight, friction, weight is bigger at the start.
Accelerate left (speed up)
Stay at constant speed
Slow down (accelerate right)
Task 2
45N left, speed up.
100,000N up, accelerate up.
0N, stay at constant speed.
118N down, accelerate down.
0N, will not move up or down.
Task 5: Friction and drag
Task 5: Friction and drag
Task 5b: Make notes that:
Define friction, air resistance and water resistance.
Explain how friction can be overcome.
Answer the following questions about a water slide: A water slide is in an outdoor playground. The water is usually turned off but children can still use the slide. On some days in summer, the water is turned on.
1) Explain why children do not speed up much on the slide when it is dry.
2) Explain why the slide is faster when the water is turned on.
Answer the questions below on making friction.
Task 6: Stretching and squashing
Task 6: Stretching and squashing
Task 6b: Make notes that:
Describe the forces invovled when an object is squashed or stretched.
Write a method for the experiment (check your plan with slide 173)
include a labelled diagram
Draw a sketch graph of the results
Define
Elastic limit
Hooke's law
Task 6c: Complete the worksheet
Task 7: Work done and energy changes
Task 7: Work done and energy changes
Task 7b: Make notes that:
Define work done and write an equation that links work done, distance and force
Describe the energy changes when deformation occurs.
Identify which energy store has energy in a stretched or compressed spring.
Copy and complete the following (check your answers on slides 207, 210)
Catapult:
1. The person’s hand applies a pulling force ____ from the catapult to create
_______ in the elastic band, which _________ the end of the band away
from the catapult.
2. Energy is transferred from the ________ store in the person’s ___ and into
the _______ _________ energy store of the _______ ____. Some energy is
transferred to the _______ store of the elastic band.
Tennis Ball:
1. The reaction force from the ______ pushes up on the ball as it hits the
ground and _______ the ball.
2. Energy is transferred from the _____________ _________ and _______
store of the ball into the _______ _________ energy store of the ball. Some
energy is transferred to the _______ store of the ball.
Task 7c: Check you understand by answering the questions for your set.
Once you are done check you answer using the mark scheme.
Task 8: Moments
Task 8: Moments
Task 8b: Make notes that:
Describe a moment in physics.
Explain what the size of a moment can depend on.
State the equation to calculate moments, including units.
Task 8c: Check you understand by completing the exam questions. Mark your answers once you are done.
Task 9: Non-contact forces
Task 9: Non-contact forces
Task 9b: Make notes that:
Describe the difference between contact and non-contact forces
Identify the 3 non-contact forces
Describe how non-contact forces cause forces between objects without touching
Compare the 3 non-contact forces
Complete the task on slide 254. Check your answer on 255
Task : Summary
Task : Summary
Task 5a: Explore the BBC bitesize material on this topic
Task 5c: Make a mindmap or other single page revision summary and add it to your revision folder.
Complete the quiz to check your understanding of this topic
Extend
Extend
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