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Introduction
Introduction
When a force causes an object to move, work is being done on the object by the force. So when work is done, energy has been transferred from one energy store to another. Forces can make objects turn if there is a pivot, the turning effect is called a moment. In this topic, you will study how to calculate work done and moments, as well as how moments are used in everyday objects such as levers and machines.
Task 1: Know
Task 1: Know
Task 1: Use look,cover,write,check and quizlet to make sure you are familiar with the key vocabulary for this topic.
Learn
Learn
Task 2: Energy and forces revision
Task 2: Energy and forces revision
Task 2a: Enjoy the song.
Which very important idea is it reminding you of?
Task 2b: Watch the video about forces.
Quick check before you go on:
What do unbalanced forces make objects do? (click the arrow on the right to check your answer)
Accelerate - change speed or direction. Don't just say move because objects with balanced forces acting on them can be either stationary or moving at a constant speed in a straight line.
Task 2d make notes that:
List the 7 energy stores
List the key information from slide 9
List the 4 energy transfer methods
Draw an energy transfer diagram to show what is happening as the rocket is launched on slide 12
List the key information from slide 15
Draw force diagrams to show the forces acting on the rockets on slide 17
Calculate the resultant forces and describe what would happen to the astronauts on slide 19
Task 2e: Check you understand by answering the questions for your set.
Once you are done check you answer using the mark scheme.
Task 3: Mechanical work
Task 3: Mechanical work
Task 3b: Make notes that:
Draw energy transfer diagrams a cyclist from slide 4, showing the energy transfers when:
He is accelerating at the start
He is moving along steadily
Check your answers using slide 5.
State the equation to calculate work done, including the units.
Calculate the work done for the questions on slide 15. Check your answers using slide 16.
Calculate the answers to the questions on slide 19. Check your answers using slide 20.
Task 3c: Complete the progress quiz
Task 4: Moments
Task 4: Moments
Task 4b: Make notes that:
State the equation to calculate moments, including units.
State the key point from slide 11.
Use the equation to calculate the answer to the question on slide 13. Check your answer using slide 14.
Calculate the answer to the question on slide 15. Check your answer using slide 16.
Calculate the answer to the question on slide 17. Check your answer using slide 18.
Task 4c: Check you understand by completing the exam questions. Mark your answers once you are done.
Task 5: Machines and levers
Task 5: Machines and levers
Task 5b: Make notes that
Define lever
Explain why levers are used.
Watch the video and define load, fulcrum and effort.
Define the 3 types of levers and draw a diagram for each.
Calculate the answer to the question on slide 15. Check your answer using slide 16.
Calculate the answers to the questions on slide 17. Check your answer using slide 18.
Task 6: Summarise
Task 6: Summarise
Task 6b: Make a mind map or single page revision summary for this topic
add it to your revision folder
Task 7: Check
Task 7: Check
Complete the test for this topic - make sure you get the pass mark
Optional: Extension task
Optional: Extension task
Use your new knowledge to answer these questions:
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