3-FAM-02
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Contents
Outcomes
- Students should be able to label pairs of forces in a range of situations
- Students should understand that the forces are acting on different objects and therefore do not cancel out!!
Specification References
- none
Starter
- Two students on skateboards pushing off each other
- Tug of war with Newton scales
Main Body of Lesson
- Students are to make their own forcemeter using acetate sheets and steel springs. They are to use the W = m g formula from 3-TAS-01 and mark the scale on their forcemeter with set weights.
- They can test their forcemeters by measuring the weight of unknown objects A,B and C
Newton's Third Law Powerpoint including demos:
- Use of force plate on data studio of student jumping
- Stationary trolley with bow and rubber arrow
- Releasing a balloon attached to a tight string across the room
- Getting out of a row boat
- Earth pulls on apple and therefore apple pulls up on Earth
Plenary
- Firing a water rocket from Broadfield
Homework
This homework sheet has a few questions that requires the pupils to examine their knowledge of Newton's third law. Her are the answers.
Additional Information
Resources Required
- Skateboards x 2
- Force plate on data studio
- Trolley with bow and arrow mounted on top
- Balloon attached to taunt string with straw
- Tug of war with force meters
- Large crate on front desk
- Globe and apple
Textbook References
- None
Website References
- None
Skills Addressed
Safety/Hazards
The most dangerous aspects of this lesson are the tug-of-war and using the skate boards. For both demonstrations, please make sure that there is more than enough room, minimising the chance that a pupil could fall over band their head. Please refer to manual handling risk assessment, particularly if you are getting pupils to throw a medicine ball to each other.
Notes
- None