Balanced Parentheses G = (V, , S, P) V = {S} = {(,)} Start variable is S P = { S --> (S) | SS | /\}
5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s...
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Transcript of 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s...
![Page 1: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/1.jpg)
5 Newton’s Laws of Motion5-1 Force and Mass
Question: How is acceleration induced? Δv/Δt
V=20 m/s
wall
V=5 m/s V=-5m/s
V=0
Baseball:
Force; influence that causes a body to accelerationMass; how difficult to change its velocity quantity of matter in object
![Page 2: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/2.jpg)
5-2 Newton’s first law of Motion
An object at rest remains at rest as long as no net force acts on it.
An object moving with constant velocity continues to move with the same speed and in the same direction as long as no net force acts on it.
![Page 3: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/3.jpg)
Law of inertia:
if an object is already moving with constant velocity, it won’t alter its speed or direction , unless a force causes the change.
![Page 4: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/4.jpg)
5-3 Newton’s Second Law of Motion
Mass constant :)'(FF
)'(aa
Fa
Force constant :
'a
F
ma
1
![Page 5: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/5.jpg)
sum of force vectors = FFnet
m
Fa
Vector: acceleration and force , Direction: acceleration is same as net force.Force Unit:1 N=(1kg)(1 m/s2)
![Page 6: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/6.jpg)
Ex1.
Mass of a car 2000kg, the accelerate is 4 m/s2, find force?
Ex2.
A box from 0 to 0.7 m/s in 3s, m=20kg, find net force?
![Page 7: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/7.jpg)
Net force
321 FFFF
Ex3. F
F
F
2F
1F
2F
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Newton’s second law
m
Fa
m
Fa xx
m
Fa yy
m
Fa zz
![Page 9: 5 Newtons Laws of Motion 5-1 Force and Mass Question: How is acceleration induced? Δv/Δt V=20 m/s wall V=5 m/s V=-5m/s V=0 Baseball: Force; influence that.](https://reader036.fdocuments.us/reader036/viewer/2022082805/5514d534550346b0478b51ba/html5/thumbnails/9.jpg)
• Isolate the object of interest (point particle)
• Sketch the forces (every external force acting on a given object)
• Choose a convenient coordinate system
• Resolve the force into components
• Apply Newton’s second law to each coordinate direction
Free-Body diagram