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PS2 1 Newton's Second Law

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Project Zero THINKING ROUTINES

Phenomenon

Watching the direction a spinning wrench travels WIS

What did you see in the movie?

What are you curious about?

What questions do you have?

Motion:

   Force and motion

   Friction

   Acceleration

EXTRA: PULLEYS

Pulley lab activity

Pulley Inquiry activity

Aerospace applications: Pulleys WIS

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HS-PS2-1 Motion and Stability: Forces and Interactions

Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.
Performance Expectation
  Grade:  High School (9-12)

Prior Knowledge/Preview
Simple machine review Idaho Public TV
Newton's Law Review and the Hero engine WIS
Forces of Flight: Vertical Take off Smithsonian Learning Lab
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Inquiry science
Printable activity
Energy for Life: Cell Respiration activity Go To Lessons 4.3 & 4.4 CK-12
       On-line activity
Scroll to the questions in the Cellular Respiration Summary after seeing the videos Texas Gateway
    
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LAB activities
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Lab #1 Measuring forces
Lab #2  Launch forces
Lab #3  Projectile Motion
Lab #4 Pulley use: the bosun's chair WIS
Lab #5 Pulley inquiry lab--link will be added Washington International School
​
EXTENSION material for the curious
PhET Forces and Motion
PhET simulation on projectile motion
Projectile motion with Barney WIS
Part ii Pulley calculations WIS
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To consider after you have investigated Newton's Laws:

Why did Newton, an Englishman, write in Latin?

Who would be able to read his Principia Mathematica?  Is this limited access fair? Why/whynot?

Newton's First Law

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An object either remains at rest or continues to move at a constant velocity, unless acted upon by a force

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              Sum of forces = 0        Change in velocity dv/dt = 0

 

An object that is at rest will stay at rest unless a force acts upon it.

An object that is in motion will not change its velocity unless a force acts upon it.

 

 

The property where massive bodies resist changes in motion is called inertia

Slide02.jpeg

PS2 1 Newton's Second Law

Slide02.jpeg

Project Zero THINKING ROUTINES

Phenomenon

Watching the direction a spinning wrench travels WIS

What did you see in the movie?

What are you curious about?

What questions do you have?

Slide08.jpeg
Prior Knowledge/Preview
Simple machine review Idaho Public TV
Newton's Law Review and the Hero engine WIS
Forces of Flight: Vertical Take off Smithsonian Learning Lab
Newton’s Three Laws Smithsonian Learning Lab

​

Motion:

   Force and motion

   Friction

   Acceleration

EXTRA: PULLEYS

Pulley lab activity

Pulley Inquiry activity

Aerospace applications: Pulleys WIS

​

HS-PS2-1 Motion and Stability: Forces and Interactions

Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.
Performance Expectation
  Grade:  High School (9-12)

Wrench

Pixy.org PD



Inquiry science
Printable activity
       On-line activity
Newton's 2nd Law Study Aid  CK-12
    

LAB activities follow safety guidelines above and in the activity

Lab #1 Measuring forces
Lab #2  Launch forces
Lab #3  Projectile Motion
Lab #4 Pulley use: the bosun's chair WIS
Lab #5 Pulley inquiry lab--link here-->          Washington International School



EXTENSION material for the curious
PhET Forces and Motion
PhET simulation on projectile motion
Projectile motion with Barney WIS
Part ii Pulley calculations WIS
NASA Rocketry and Newton's Second Law
 

Hero Engine

NASA PD

Slide09.jpeg
Slide08.jpeg
Slide09.jpeg

To consider after you have investigated Newton's Laws:

Why did Newton, an Englishman, write in Latin?

Who would be able to read his Principia Mathematica?  Is this limited access fair? Why/whynot?

Newton's First Law

​

An object either remains at rest or continues to move at a constant velocity, unless acted upon by a force

​

​

​

 

              Sum of forces = 0        Change in velocity dv/dt = 0

 

An object that is at rest will stay at rest unless a force acts upon it.

An object that is in motion will not change its velocity unless a force acts upon it.

 

 

The property where massive bodies resist changes in motion is called inertia

Slide02.jpeg
Slide04.jpeg

Newton's Second Law

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The force F on an object is equal to the mass  m of that object multiplied by the acceleration a of the object: 

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                                              F = ma

 

 

Force and acceleration are vector quantities—they have both magnitude AND direction

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The second law states that the rate of change of momentum, p (unit kg.m/s), of a body is directly proportional to the force applied, and this change in momentum takes place in the direction of the applied force

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Mass = amount of matter in an object

 

Weight = force of gravity (acceleration due to gravity) acting on a body of mass m

 

So weight (in newtons, N)  = m x acceleration due to gravity 

                                                = mass x 9.8 m/s^2

Newton's Third Law

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When a body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first 

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The third law states that all forces between two objects exist in equal magnitude and opposite direction: if one object A exerts a force FA on a second object B, then B simultaneously exerts a force FB on A, and the two forces are equal in magnitude and opposite in direction: FA = −FB. The third law means that all forces are interactions between different bodies

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If you throw a ball on Earth, standing on the ground, there is no measurable effect to the much more massive Earth—but if you were at an ice rink on ice skates, you would move backwards as you threw the ball forwards

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Limits of the laws—they work well in macroscopic, moderate Earth conditions

 

Newton’s Laws are less useful in certain circumstances, in very small scales, at very high speeds, or in very strong gravitational fields

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