| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
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A machines transmits a force from one place or object to another. |
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What is the role of a machine in terms of forces? |
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Simple machines give bigger force but at the expense of smaller movement (and vice versa) |
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What is the advantage and disadvantage of a simple machine? |
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Simple machines include:
- Ramps
- Levers
- Pulleys
- Wedge
- Screw |
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Give 3 examples of simple machines. Identify common place devices as the type of simple machine.
eg. Scissors as a double level. |
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The product of force and displacement is work done.
Work done is also known as energy transferred.
The unit of work done is therefore Joules. |
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What is work done?
What is work done also known as?
What unit do we use for work done? |
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The 'energy transferred in' is equal to the work done. |
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What is the relationship between energy transferred in and work done? |
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Aim: To find out how the number of pulleys affects the force required to lift a 6N load.
Secondary Aim: To find out how the number of pulleys affects the distance moved of Effort and Load.
Tertiary Aim: To find out how the number of pulleys affects the input work done vs output work done. |
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Pulleys and masses on retort stand.
Change:
- Number of pulleys
Measure:
- Input force
- (Output force)
- Distance Effort moves
- Distance Load moves
Calculate:
- Input work done
- Output work done
- Efficiency perhaps
This is best set up as a circus with different numbers of pulleys, so that the students do not have to rethread pulley systems. |
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Use physical processes and mechanisms, and energy changes, to explain the intermediate steps that bring about changes conditions of a system |
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Use forces and force loops and energy to describe:
- Rollercoasters
- Breaking (of a car)
- Internal combustion engine |
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