
Newton's Second Law
Presentation
•
Science
•
9th Grade
•
Practice Problem
•
Medium
Standards-aligned
Charles Lawrence
Used 2+ times
FREE Resource
21 Slides • 12 Questions
1
Newton's Second Law
Lawrence December 2021
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Learning Target
HS-PS2-1. Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force, mass, and acceleration.
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Success Criteria
I can determine the acceleration of an object based upon it mass and the net force acting on it.
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Sir Issac Newton
Mathematician and Physicist
3 Laws of Motion
Law of Universal Gravitation
Matemático y físico
3 leyes del movimiento
Ley de la gravitación universal
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Net Force
The sum of all forces acting on an object
La suma de todas las fuerzas que actúan sobre un objeto.
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Multiple Choice
What is the net force acting on the object?
¿Cuál es la fuerza neta que actúa sobre el objeto?
10 Kg
5 N Right
0 N
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Multiple Choice
What is the net force acting on the object?
¿Cuál es la fuerza neta que actúa sobre el objeto?
10 Kg
5 N Left
0 N
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Multiple Choice
What is the net force acting on the object?
¿Cuál es la fuerza neta que actúa sobre el objeto?
2 N Right
3 N Left
5 N Right
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2nd Law of Motion
An object’s acceleration is determined by its mass and the net force acting on it.
La aceleración de un objeto está determinada por su masa y la fuerza neta que actúa sobre él.
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A great force = greater acceleration
Una gran fuerza = mayor aceleración
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General Rule
2 times the force = 2 times the acceleration
2 veces la fuerza = 2 veces la aceleración
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​
A greater mass = less acceleration
Una mayor masa = menos aceleración
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General Rule
Twice the mass = half the acceleration
Dos veces la masa = la mitad de la aceleración
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What is the object's acceleration?
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No net force = no acceleration
Sin fuerza neta = sin aceleración
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Picture explanation
The astronaut is in zero gravity
He has 3 balls of different masses.
He blows on them to accelerate them.
The balls do not accelerate at the same rate.
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Explicación de la imagen
El astronauta está en gravedad cero.
Tiene 3 bolas de diferentes masas.
Sopla sobre ellos para acelerarlos.
Las bolas no aceleran al mismo ritmo.
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Multiple Choice
Which object has more mass?
¿Qué objeto tiene más masa?
The fastest one
El mas rapido
The slowest one
The second fastest and second slowest one
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Multiple Choice
How can you tell which ball is has the most mass?
The one with the most mass will have the least amount of acceleration
The one with the most mass will have the most amount of acceleration
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Multiple Choice
What is the acceleration of the object?
¿Cuál es la aceleración del objeto?
0 m/s/s
(Net Force = 0 N)
5 m/s/s Left
5 m/s/s Right
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Multiple Choice
What is the acceleration of the object?
¿Cuál es la aceleración del objeto?
0 m/s/s
Net Force = 0 N
2 m/s/s Right
Net Force = 2 N
5 m/s/s Right
Net Force = 2 N
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Special Notice Pay attention
No net force can mean two things
Ninguna fuerza neta puede significar dos cosas
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Special Notice Pay attention
1. The object is not moving
El objeto no se mueve
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Special Notice Pay attention
2. The object is moving at a constant speed.
El objeto se mueve a una velocidad constante.
0 Net Force = 0 accleration
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4 Forces acting on an aircraft
When the 4 forces are in balance, the aircraft is flying straight and level at a constant speed
Cuando las 4 fuerzas están en equilibrio, la aeronave vuela recto y nivelado a una velocidad constante.
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Measuring Friction
To measure friction we pulled the object at a constant speed
Para medir la fricción tiramos del objeto a una velocidad constante.
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Measuring Friction
At a constant speed, the force on the spring scale is equal but opposite the force of Friction
A una velocidad constante, la fuerza en la escala del resorte es igual pero opuesta a la fuerza de fricción
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Measuring Friction
This works only when you pull the object at a constant speed.
Esto solo funciona cuando tira del objeto a una velocidad constante.
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Multiple Choice
In which direction will the object accelerate?
¿En qué dirección acelerará el objeto?
Left
Right
No Acceleration
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Multiple Choice
In which direction will the object accelerate?
¿En qué dirección acelerará el objeto?
Left
Right
No Acceleration
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Multiple Choice
In which direction will the object accelerate?
¿En qué dirección acelerará el objeto?
Left
Right
No Acceleration
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Multiple Choice
Is the object stopped or moving at a constant speed?
¿El objeto se detiene o se mueve a una velocidad constante?
Stopped
Constant Speed
It could be stopped OR moving at a constant speed
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Multiple Choice
To measure friction, how do you pull the block?
Para medir la fricción, ¿cómo se tira del bloque?
It needs to accelerate
Necesita acelerar
It needs to move at a constant speed
Necesita moverse a una velocidad constante.
Newton's Second Law
Lawrence December 2021
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