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Слайды и текст к этой презентации:
№1 слайд![Newton s Third Law of Motion](/documents_6/584ecc32f6881343f6918d5f23cec7be/img0.jpg)
Содержание слайда: Newton’s Third Law of Motion
Whenever one object exerts a force on a second object, the second exerts an equal force in the opposite direction on the first.
№2 слайд![First Example of rd Law A](/documents_6/584ecc32f6881343f6918d5f23cec7be/img1.jpg)
Содержание слайда: First Example of 3rd Law
A horse harnessed to a cart exerts an equal and opposite force to the cart as it exerts a force against the ground.
№3 слайд![Second Example of rd Law](/documents_6/584ecc32f6881343f6918d5f23cec7be/img2.jpg)
Содержание слайда: Second Example of 3rd Law
Space shuttle’s rocket boosters propel the orbiter into space by exerting an equal and opposite force to exhaust gasses.
№4 слайд![Concept Question Why are we](/documents_6/584ecc32f6881343f6918d5f23cec7be/img3.jpg)
Содержание слайда: Concept Question 1
Why are we able to walk?
№5 слайд![Concept Question Answer We](/documents_6/584ecc32f6881343f6918d5f23cec7be/img4.jpg)
Содержание слайда: Concept Question Answer
We walk forward because when one foot pushes backward against the ground, the ground pushes forward on that foot.
№6 слайд![Concept Question What makes a](/documents_6/584ecc32f6881343f6918d5f23cec7be/img5.jpg)
Содержание слайда: Concept Question 2
What makes a car go forward?
№7 слайд![Concept Question answer By](/documents_6/584ecc32f6881343f6918d5f23cec7be/img6.jpg)
Содержание слайда: Concept Question answer
By Newton’s third law, the ground pushes on the tires in the opposite direction, accelerating the car forward.
№8 слайд![Concept Question Which is](/documents_6/584ecc32f6881343f6918d5f23cec7be/img7.jpg)
Содержание слайда: Concept Question
Which is stronger, the Earth’s pull on an orbiting space shuttle or the space shuttle’s pull on the earth?
№9 слайд![Concept Question Answer](/documents_6/584ecc32f6881343f6918d5f23cec7be/img8.jpg)
Содержание слайда: Concept Question Answer
According to Newton’s Third Law, the two forces are equal and opposite. Because of the huge difference in masses, however the space shuttle accelerates much more towards the Earth than the Earth accelerates toward the space shuttle.
a = F/m
№10 слайд![Problem What force is needed](/documents_6/584ecc32f6881343f6918d5f23cec7be/img9.jpg)
Содержание слайда: Problem 1
What force is needed to accelerate the 60 kg cart at 2m/s^2?
№11 слайд![How to solve Problem What](/documents_6/584ecc32f6881343f6918d5f23cec7be/img10.jpg)
Содержание слайда: How to solve Problem 1
What force is needed to accelerate the 60kg cart at 2 m/s^2?
Force = mass times acceleration
F = m * a
F = 60kg * 2m/s^2
F = 120kgm/s^2
Kgm/s^2 = Newton
Newton = N
F =120 N
№12 слайд![Problem A force of N](/documents_6/584ecc32f6881343f6918d5f23cec7be/img11.jpg)
Содержание слайда: Problem 2
A force of 200 N accelerates a bike and rider at 2 m/s^2. What is the mass of the bike and rider?
№13 слайд![How to solve Problem A force](/documents_6/584ecc32f6881343f6918d5f23cec7be/img12.jpg)
Содержание слайда: How to solve Problem 2
A force of 200 N accelerate a bike and rider at 2m/s^2. What is the mass of the bike and rider?
F = ma therefore:m =F/a
m = 200N/2m/s^2
N= kgm/s^2 so when divide your answer will be kg left.
m = 100kg