
Introduction to Forces
Presentation
•
Science
•
9th Grade
•
Practice Problem
•
Easy
+5
Standards-aligned
Charles Lawrence
Used 23+ times
FREE Resource
33 Slides • 16 Questions
1
Introduction to Forces
Introducción a las fuerzas
Lawrence December 2021
2
Learning Target
The force acting on an object and the object's mass will change in motion of an object.
La fuerza que actúa sobre un objeto y la masa del objeto cambiarán en el movimiento de un objeto.
3
Success Criteria
I can identify the amount of force(s) acting on an object.
Puedo identificar la cantidad de fuerzas que actúan sobre un objeto.
4
Essential Question
How do I measure the net force acting on an object?
¿Cómo mido la fuerza neta que actúa sobre un objeto?
5
Force
A push or pull on an object
Empujar o tirar de un objeto
6
Push
7
Pull
8
Types of forces
Contact
Non-contact
Contacto
Sin contacto
9
Contact force
the force must be in contact with the object
La fuerza debe estar en contacto con el objeto
10
Non-contact force
acts with out touching the object
Magnetism
Gravity
Actúa sin tocar el objeto
Magnetismo
Gravedad
11
Multiple Choice
What type of force?
¿Qué tipo de fuerza?
Contact
Non-Contact
12
Multiple Choice
What type of force?
¿Qué tipo de fuerza?
Contact
Non-Contact
13
Multiple Choice
What type of force?
¿Qué tipo de fuerza?
Contact
Non-Contact
14
Multiple Choice
What type of force?
¿Qué tipo de fuerza?
Contact
Non-Contact
15
A force can affect motion
Gravity will cause an object to accelerate downward.
La gravedad hará que un objeto se acelere hacia abajo.
16
A force can affect motion
A force can cause an object to speed up
Una fuerza puede hacer que un objeto se acelere
17
A force can affect motion
a force can cause an object to slow down
Una fuerza puede hacer que un objeto se ralentice
18
A force can affect motion
A force can change the direction that an object travels
A force can change the direction that an object travels
19
Multiple Choice
How did the truck stop?
¿Cómo se detuvo el camión?
The brakes applied a force in the direction of motion
Los frenos aplicaron una fuerza en la dirección del movimiento.
The brakes applied a force opposite the motion
Los frenos aplicaron una fuerza opuesta al movimiento.
The brakes changed the direction of motion
Los frenos cambiaron la dirección del movimiento.
20
Multiple Choice
How will the force of the rocket enginve affect the motion of the car?
It will speed up
Se acelerara
It will slow down
Se ralentizará
It will change its direction
Cambiará su dirección
21
Unit for force
Newton or N
22
Forces are a vector quantity
Magnitude in Newtons
Direction
23
Net Force
The sum of all forces acting on an object
La suma de todas las fuerzas que actúan sobre un objeto.
24
Net force
The 2 forces act opposite of each other.
Net force = 0 N
(5 N - 5 N)
Las 2 fuerzas actúan opuestas entre sí.
Fuerza neta = 0 N
25
Net force
The 2 forces act opposite of each other.
Net force = 2 N to the Right
(5 N - 3 N)
Las 2 fuerzas actúan opuestas entre sí.
Fuerza neta = 2 N A la derecha
26
Net force
The 2 forces act in the same direction
Net force = 7 N to the Right
(3 N + 4 N)
Las 2 fuerzas actúan en la misma dirección
Fuerza neta = 7 N A la derecha
27
Multiple Choice
What is the net force acting on the object?
¿Cuál es la fuerza neta que actúa sobre el objeto?
<-- 4 N Left
10 N Right -->
6 N Right -->
<-- 14 N Left
28
Multiple Choice
What is the net force acting on the object?
¿Cuál es la fuerza neta que actúa sobre el objeto?
<-- 7 N Left
<-- 27 N Left
<-- 17 N Left
29
Multiple Choice
What is the net force acting on the object?
¿Cuál es la fuerza neta que actúa sobre el objeto?
10 N
6 N
0 N
30
Multiple Choice
What is the net force acting on the rope?
¿Cuál es la fuerza neta que actúa sobre la cuerda?
<-- 500 N Left
600 N Right -->
100 N Right -->
31
Multiple Choice
What is the net force acting on the rope?
¿Cuál es la fuerza neta que actúa sobre la cuerda?
<-- 700 N Left
600 N Right -->
<-- 100 N Left
32
Sliding Friction
fricción de deslizamiento
33
Sliding Friction
fricción de deslizamiento
34
Rolling Friction
Moving on wheels
fricción rodante
35
Rolling Friction
Moving on wheels
fricción rodante
36
Fluid Friction
Moving through air or water
Fricción de fluidos
Moviéndose por el aire o el agua
37
Fluid Friction
Moving through air or water
Fricción de fluidos
Moviéndose por el aire o el agua
38
Multiple Choice
What type of does he experience in the sand?
Sliding
Rolling
Fluid
39
Multiple Choice
What type of friction?
Sliding
Rolling
Fluid
40
Multiple Choice
What type of friction?
Sliding
Rolling
Fluid
41
Using a spring scale
A spring scale uses a spring to measure forces
Measure in Newtons
42
Using a spring scale
43
Measuring weight
44
Measuring Sliding friction
45
Measuring Sliding friction
46
Measuring Rolling Friction
47
Reading a Spring Scale
Read the N side
each line = .2 N
The reading at right = 1.7 N
(1/2 way between 1.6 and 1.8 N)
48
Multiple Choice
What d we use to measure forces?
Meter Stick
Graduated Cylinder
Spring Scale
49
Multiple Choice
What unit do we use on the spring scale?
Grams
Newtons
Introduction to Forces
Introducción a las fuerzas
Lawrence December 2021
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