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Balanced and Unbalanced Forces
Forces and Motion
Lesson 01. Forces
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Slide 1:
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Physics
Secondary Education
Age 13
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Forces and Motion
Lesson 01. Forces
Slide 1 - Diapositive
How are you today?
😒
🙁
😐
🙂
😃
Slide 2 - Sondage
Highlights of the Day
describe
the effects of balanced and unbalanced forces on motion
Value :
Responsibility
Slide 3 - Diapositive
Forces and Motion
Lesson 01. Forces
Slide 4 - Diapositive
Describe the the following pictures.
1
2
3
Slide 5 - Diapositive
What did the boy do to the cart?
Is force applied on the cart by the boy?
YES
NO
Slide 6 - Sondage
Describe the the following pictures.
1
2
3
Slide 7 - Diapositive
What did the girl do to open the door?
Is force applied on the door by the girl?
YES
NO
Slide 8 - Sondage
Describe the the following pictures.
1
2
3
Slide 9 - Diapositive
Is the rock moving?
YES
NO
Slide 10 - Sondage
Is there a force acting on the rock?
YES
NO
Slide 11 - Sondage
What is a "force"?
Slide 12 - Carte mentale
Slide 13 - Diapositive
QUESTION TIME!
Slide 14 - Diapositive
Forces and Motion
Lesson 01. Forces
Slide 15 - Diapositive
3
Slide 16 - Vidéo
Forces and Motion
Lesson 01. Forces
Slide 17 - Diapositive
Look at the pictures below.
Slide 18 - Diapositive
Drag and Drop
Balanced Forces
Unbalanced Forces
Slide 19 - Question de remorquage
Can you see the forces acting on an object?
YES
NO
Slide 20 - Sondage
Can you see the EFFECTS of forces acting on an object?
YES
NO
Slide 21 - Sondage
If you cannot see force,
how can you show it in a diagram?
Slide 22 - Diapositive
Using an arrow
tail
head
}
length
Slide 23 - Diapositive
Forces have
magnitude
and
direction
.
Slide 24 - Diapositive
stronger
weaker
Slide 25 - Question de remorquage
The ball is at rest or not moving. What forces are acting on the ball?
Slide 26 - Diapositive
Forces acting on the ball
weight by gravity
Slide 27 - Diapositive
Forces acting on the ball
weight by gravity
normal force
Slide 28 - Diapositive
If mass has a unit of grams, which of the following is the unit of force?
A
kilograms (kg)
B
newtons (N)
C
meters (m)
Slide 29 - Quiz
Positive and Negative Directions
Positive Directions
Negative Directions
Forward
North
Backward
South
right
left
down
up
Slide 30 - Diapositive
What type of direction is "rightward"?
A
negative
B
positive
C
meters (m)
Slide 31 - Quiz
Unit of FORCE
newtons or
N
Slide 32 - Diapositive
Forces acting on the ball
weight by gravity
normal force
Slide 33 - Diapositive
Example 1:
normal force
positive 10 newtons
( + 10 N)
upward is POSITIVE
Slide 34 - Diapositive
Example 2:
weight by gravity
negative 10 newtons
( - 10 N)
downward is NEGATIVE
Slide 35 - Diapositive
Forces acting on the ball
weight by gravity
normal force
+5 newtons
-5 newtons
Slide 36 - Diapositive
Force Diagram
weight by gravity
normal force
+5 newtons
-5 newtons
wind
wind
Slide 37 - Diapositive
How will you make the ball move?
+3 newtons
-3 newtons
force 1
force 2
Slide 38 - Diapositive
Balanced forces are two or more forces acting on an object that are ______ in size and _______ in direction.
A
unequal ; opposite
B
equal ; opposite
C
unequal ; similar
D
equal ; similar
Slide 39 - Quiz
Forces and Motion
Lesson 01. Forces
Slide 40 - Diapositive
Rate your level of understanding and participation in this lesson.
1
5
Slide 41 - Sondage
00:29
TRUE OR FALSE:
Balanced forces cause no change in the speed and direction of objects.
A
TRUE
B
FALSE
Slide 42 - Quiz
00:50
What TWO things do forces have?
Slide 43 - Question ouverte
00:55
Unbalanced forces are not equal. They cause the motion of an object to ______________.
A
stay the same
B
change
Slide 44 - Quiz
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