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Unit: Newton's 2nd Law of Motion and Acceleration

Page history last edited by Shu-Yee Chen 10 years, 3 months ago

Unit: Newton's 2nd Law of Motion and Acceleration

Physics of Olympic Sport: http://bcove.me/e1cyosjz

Central Concept-Newton's Laws of Motion: Newton's laws of motion and gravitation describe and predict the motion of most objects. When you push on a shopping cart, how much does it accelerate? The principle of inertia (Newton’s first law) says that forces will change velocities, but now how much. Newton figured out a relationship: acceleration = net force ÷ mass. This is Newton’s second law of motion.

Cross Cutting Concept-Cause and Effect : Look for evidence in a situation, provide an explanation (using your knowledge of forces, Newton's Laws of Motion) for how forces affect the motion of the objects.

Science and Engineering Practices-Constructing Explanations (for science) and designing solutions (for engineering): Construct logically coherent explanations of phenomena that you observe. In the explanation, incorporate your current understanding of forces, Newton's Laws that are consistent with available evidence. Evaluate and critique competing design solutions based on a jointly developed and agreed-on design criteria.

Learning Objectives:

By the end of this unit, you should be able to.... (Those in bold will be essential & will be assessed formally in the curriculum)

1.	Perform calculations relating to the net force, mass, and acceleration.
2.	Understand relative range of acceleration of common objects in the SI unit.
3.	Interpret constant velocity motion vs. accelerated motion on a position-time, velocity time, and acceleration-time graphs.
4.	Describe the effects of air resistance and drag force. Apply this to the situation of terminal velocity. (We might only touch on this a bit in the reading)
5.	Interpret and apply Newton's 2nd Law of Motion.
6.	Describe the difference between the mass and the weight of the object.
7.	Explain how Newton's Laws of Motion affect the motions of objects using C.E.R (Claims, Evidence, Reasoning)

Vocabulary:

force	Free Body Diagram (Force Diagram)	F net	mass	weight
friction	constant motion	static friction	kinetic friction	F = ma
gravity	vector	acceleration	change of velocity	speed
direction	kg	N	N/kg	m/s/s
inertia	equilibrium	scalar