| Method |
Precise Learning Objective |
Linked |
Question / Activity
(Designed for maximum working out) |
Stepping Stones |
Pitstop Check
(Thinking Map) |
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Newton's Third Law:
Whenever two objects interact, the forces they exert on each other are equal and opposite. |
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What is Newton's Third Law? |
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Newton's First Law:
If the resultant force acting on an object is zero and the object is stationary, the object remains stationary.
If the object is moving, the object continues to move at the same speed and in the same direction. So the object continues to move at the same velocity. |
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What would happen to an object if the resultant force acting upon it is zero and the object is stationary? students identify the resultant force of force diagrams and identify direction/stationary |
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Newton's First Law:
If the resultant force acting on an object is zero and the object is moving, the object continues to move at the same speed and in the same direction. So the object continues to move at the same velocity. |
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What would happen to an object if the resultant force acting upon it is zero and the object is moving? |
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Students should be able to apply Newton's Third Law to examples of equilibrium situations. |
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How can Newton's Third Law be applied to examples of equilibrium? GF: Discuss the link between Newton's Third Law and the principals of chemical equilibrium |
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As an equation:
resultant force = mass x acceleration
F = m a
force, F, in newtons, N mass, m, in kilograms, kg
acceleration, a, in metres per second squared, m/s2 |
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What is the equation that links resultant force, mass and acceleration? Demo: Use the data loggers with the wooden trolley and ramp to show how increasing the force on end of the string increases acceleration. Data could be collected on logger or using laptop with easy sense software. |
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When a vehicle travels at a steady speed the resistive forces balance the driving force. |
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If the resistive forces balance the driving force what happens to the vehicle in terms of speed? Show video clip of a racing car and ask students to consider how the forces acting on the car change at different points:
- along the straight
- around a bend
- when they reach - max speed
<https://www.youtube.com/watch?v=MzQ8CzXRO8A> |
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The velocity (speed and/or direction) of an object will only change if a resultant force is acting on the object. |
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When will the velocity (speed and/or direction) of an object change? MWB quiz to predict if an object is changing speed, direction or no change from different situations |
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Students should be able to apply Newton's First Law to explain the motion of objects moving with a uniform velocity and objects where the speed and/or direction changes. |
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How can Newtons first law be applied to the motion of an object moving with uniform velocity and objects where the speed and/or direction changes? EW: How can Newtons first law be applied to the motion of an object moving with uniform velocity and objects where the speed and/or direction changes? |
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