Physics Lesson 10 Newtons Third Law of Motion
- Slides: 94
Physics Lesson 10 Newton’s Third Law of Motion – Action & Reaction Eleanor Roosevelt High School Chin-Sung Lin
Review – Newton’s First Law of inertia Every object continues in a state of rest, or of motion in a straight line at constant speed, unless it is compelled to change that state by an unbalanced force exerted upon it
No Unbalanced Force No unbalanced force means the net force = 0 Fnet = 0 Stay at Rest or Constant Velocity
Review - Newton’s Second Law of Force & Acceleration The acceleration produced by a net force on an object is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object
Unbalanced Force Unbalanced force means the net force ≠ 0 Fnet ≠ 0 F m Fnet = m a a
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law Example
Newton’s Third Law of Action & Reaction (or Interaction) Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object To every action there is always an equal opposing reaction
Newton’s Third Law Action force = Reaction force Faction = Freaction
Newton’s Third Law Action and reaction forces are acting on different objects It doesn’t matter which one is called action and which one is called reaction Force is not something an object has, like mass. Force is an interaction between two objects There cannot be action force without a reaction force
System Concept A systems is a coherent entity which has certain function A system can be characterized and described by its input and output, and the relation between them A system can be viewed as a collection of interconnected subsystems
Example: Identify the Interaction
Example: Identify the Interaction Earth attracts the vase Fg
Example: Identify the Interaction Earth attracts the vase The vase attracts Earth Fg
Example: Identify the Interaction The table supports the vase FN
Example: Identify the Interaction The table supports the vase The vase pushes the table FN
Example: Identify the Interaction Fg FN
Example: Identify the Interaction If the vase is our focus (or system) Fg FN
Example: Identify the Interaction If the vase is our focus (or system) Fg = F N Fg FN
Exercise: Identify the Interaction
Exercise: Identify the Interaction Fg
Exercise: Identify the Interaction FT
Exercise: Identify the Interaction FT Fg
Exercise: Identify the Interaction FT Fg
Exercise: Identify the Interaction FT Fg = F T Fg
Newton’s Third Law Action force = Reaction force Faction = Freaction Do they cancel each other out?
Why Does the Man-Box Move? A Man-Box System
Why Does the Man-Box Move? A Man-Box System Horizontal forces only
Why Does the Man-Box Move? A Man System Horizontal forces only
Why Does the Man-Box Move? A Box System Horizontal forces only
Why Does the Man-Box Move? A Man-Box System Horizontal forces only
Newton’s Third Law Action force = Reaction force Faction = Freaction They do not cancel each other out since they are acting on the different objects
Why Does the Horse-Cart Move? A Horse-Cart System
Why Does the Horse-Cart Move? A Horse-Cart System Horizontal forces only
Why Does the Horse Move? A Horse System Horizontal forces only
Why Does the Horse Move? A Horse System Horizontal forces only
Why Does the Cart Move? A Cart System Horizontal forces only
Why Does the Cart Move? A Cart System Horizontal forces only
Why Does the Horse-Cart Move? A Horse-Cart System Horizontal forces only
Why Does the Horse-Cart Move? A Horse-Cart System Horizontal forces only
Exercise: Identify the Interaction A Rear Wheel Drive Car
Exercise: Identify the Interaction A Front Wheel Drive Car
Exercise: Identify the Interaction
Exercise: Identify the Interaction A 100 N pushing force at 30 o angle is exerted on a 10 kg block against the wall. Identify and calculate all the forces acting on the block by drawing the freebody diagram 100 N 30 o 10 kg
Exercise: Identify the Interaction 100 N 30 o 10 kg
Newton’s Third Law Action force = Reaction force Faction = Freaction m 1 a 1 = m 2 a 2
Interaction on Different Masses
Interaction on Different Masses
Interaction on Different Masses 50 kg 2 m/s 2 40 kg a=?
Interaction through a String The reading of the scale is 50 N reading of the scale? The mass of the object is 5 kg reading of the scale?
Interaction through a String reading of the scale?
Interaction through a String MA = MB = 5 kg FTA = ? FTC = ? MC = ?
Interaction through a String m 10 kg 20 kg
Interaction through a String M 2 = 5 kg T Θ = 30 o
Interaction with acceleration At rest or constant speed a = 0 m/s 2
Interaction with acceleration At rest or constant speed Fg a = 0 m/s 2
Interaction with acceleration At rest or constant speed Fg FN a = 0 m/s 2 FN = F g Scale Reading
Interaction with acceleration Accelerate upward a
Interaction with acceleration Accelerate upward Fg a
Interaction with acceleration Accelerate upward Fg FN a FN > F g Scale Reading
Interaction with acceleration Accelerate downward a
Interaction with acceleration Accelerate downward Fg FN a FN < F g Scale Reading
Interaction with acceleration Accelerate Downward with a=g
Interaction with acceleration Accelerate Downward with a=g Fg a=g
Interaction with acceleration Accelerate Downward with a=g Fg a=g FN = 0 N Scale Reading = 0 N
Interaction with acceleration
Interaction with acceleration
Interaction with acceleration Reading?
Interaction with acceleration m 1 = 10 kg T=? a = 2 m/s 2 Frictionless m 2 = ?
Newton’s Third Law Video
Summary Newton’s third law - Faction = Freaction Every action always pairs with an equal opposing reaction Action and reaction forces won’t cancel out each other since they are acting on different objects Identify the interactions Use system concept and free-body diagram to identify the forces exerting on a system
Summary Use system concept and free-body diagram to explain motion Interaction on different masses m 1 a 1 = m 2 a 2 Interaction through a string - Tension Interaction with acceleration
- Site:slidetodoc.com
- Newtons third law
- Newtons third law of motion
- Slightly tilted wings of airplanes deflect
- Slightly tilted wings of airplanes deflect
- Describe newtons third law
- Newton's third law of thermodynamics
- What are newton's laws
- Newton's second law
- Newton's first law and second law and third law
- Si unit of newton's first law
- Newtons 3 rd law of motion
- Newtons 3 rd law of motion
- Rd law
- Newton's first law of motion meme
- Newtons 3 rd law of motion
- What are newtons 3 laws
- Newtons 3 rd law of motion
- First law of newton
- Newtons second.law
- 2nd law of motion examples
- Newtons law of motion
- Section 2 newtons laws of motion
- Newtons third aw
- Newton's third law of motion examples
- According to the third law of motion action and reaction
- Gadgets based on newton's third law of motion
- Third law of motion examples
- Law of motion 3rd
- Newton's third law of motion
- Slightly tilted wings of airplanes deflect
- Chapter 5 newton's third law of motion
- Newton's second law of motion
- Chapter 7 newton's third law of motion
- Content practice a lesson 4 newton's third law answer key
- Newtons laws od motion
- 3 law of newton
- Newton three law
- Backward caries definition
- G j mount classification of caries
- Newton's second law in soccer
- Describe newtons second law
- More mass more inertia
- Newtons fourth law
- Newtons 3 rd law
- Newtons 3 rd law
- Newton’s cooling law
- Difference between weight and mass
- Newtons 3 laws quiz
- Newtons 3 rd law
- Newtons 3 rd law
- Newtons 3 rd law
- Newtons 3 rd law example
- Section 3 using newtons laws
- Newtons nd law
- Newton's st law
- Newtons 1 st law
- Mustafa sheikh
- Newtons 3 laws
- Newton's law
- Facts about newtons laws
- Newtons second law
- Newtons 1 st law
- Newtons second law example
- Newtons first law pictures
- Newtons nd law
- Lesson 4 gravity and motion lesson review
- Boyle's law charles law avogadro's law
- P=k/v
- Lesson 8-5 law of sines and cosines
- Perpetual motion machine of third kind
- Newton's third law
- Cartoon law of universal gravitation
- Newton's kepler's third law
- Kepler's third law animation
- Newton's third law diagram
- 3 newton's laws
- Klargs third law
- Third law of thermodynamics is depend on
- Planck statement of the third law
- Chapter 12 section 3 newton's third law answer key
- 10 year old sarah stands on a skateboard
- Chapter 7 newton's third law
- You cannot without being kissed newton's third law
- Third law of newton
- Brandon levan
- Newton's third law
- Newtons laws of gravity
- Newton's third law
- Third law of thermodynamics
- Newton's third law
- Newton's third law hammer and nail
- Chapter 7 newton's third law
- Modern physics vs classical physics
- University physics with modern physics fifteenth edition