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types of forces
SCIENCE
GRADE-9 OCT 4, 2020
Grade-9
OCT 4, 2020
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Science
Secondary Education
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SCIENCE
GRADE-9 OCT 4, 2020
Grade-9
OCT 4, 2020
Slide 1 - Slide
INSTRUCTIONS
Keep the mic muted do not on unless instructed
Turn on your camera
Raise your hands while talking
write names in chat section
Maintain the online class decorum
Slide 2 - Slide
What do you already know about force?
Slide 3 - Open question
Slide 4 - Slide
Objectives
Describe force
Analyse different types of forces
Slide 5 - Slide
Force
A push or pull on an object is a force
force changes object's speed and also its direction
Slide 6 - Slide
COMPARE ??
Slide 7 - Slide
Contact force- Is applied by one object into another that is touching it
Non contact force - not touching it
Slide 8 - Slide
Slide 9 - Slide
Slide 10 - Slide
TENSION
ELASTIC
Slide 11 - Slide
electrostatic force
gravity
Slide 12 - Slide
which is a contact force?
A
A girl pulls the plug of an hair dryer from the socket
B
A leaf falls to the ground
C
A magnet pulls an a nail 2cm away
D
A small bit of paper is pulled towards an charged comb
Slide 13 - Quiz
Identify the given force
A
Gravity
B
magnetic
C
elastic
D
static
Slide 14 - Quiz
Gravity depends on which of the factor
A
mass of the object
B
shape of the object
C
motion of the object
D
all the above
Slide 15 - Quiz
An apple falls from a tree branch
A person uses a rope to pull a friend on a sled
A magnet holds a picture on a fridge
A person pulls a bow back and shoots the arrow
When a person stops pedalling, the bicycle slows down
Elastic
Tension
Friction
Magnetic
Gravity
Slide 16 - Drag question
For this image given identify the force and predict whether it is contact or non -contact force
Slide 17 - Open question
For this image given identify the force and predict whether it is contact or non -contact force
Slide 18 - Open question
describe as a contact or non-contact forces-air resistance, friction, static electricity
Slide 19 - Open question
The force that stops the cyclist from skidding is
A
gravity
B
elastic
C
friction
D
magnetic
Slide 20 - Quiz
Josh is learning to dive. he is seen floating in the water. label the two forces
A
gravity and upthrust force of water
B
elastic and kinetic
C
magnetic and elastic
D
static and gravity
Slide 21 - Quiz
name two words learnt today
Slide 22 - Mind map
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