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Unit 5.1. Gravity, normal forces and applied for ...
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What is an applied force?
 
A force exerted by a person or object
 
A force from a surface
 
A force caused by gravity
 
A force caused by air
What is a normal force?
 
A force from muscles
 
A force from a surface that supports an object
 
A pulling force from the Earth
 
A force from wind
Which is NOT an applied force?
 
Gravity
 
Pushing a cupboard
 
Pulling a rope
 
Lifting a backpack
Applied forces can cause objects to:
 
Move, stop, or change direction
 
Only move faster
 
Only slow down
 
Only fall down
When you kick a football, what force is acting on the ball?
 
Applied force
 
Normal force
 
Magnetic force
 
Gravity only
Which action uses an applied force?
 
Pushing a door open
 
A rock falling
 
A jar on a table
 
Rain falling
When an object is resting on a surface, the normal force usually balances:
 
Gravity
 
Friction
 
Applied force
 
Air resistance
Why doesn’t a book fall through the table?
 
The table provides a normal force
 
Gravity is weak
 
The book is light
 
Air holds the book up
Which situation shows a normal force acting?
 
A book resting on a table
 
A kite flying
 
A ball falling through the air
 
A magnet attracting metal
Which force causes rain to fall from clouds to the ground?
 
Gravity
 
Wind
 
Friction
 
Magnetism
If there were no gravity on Earth, what would happen to objects?
 
They would float away
 
They would stay still
 
They would fall faster
 
They would become heavier
Why do objects fall down instead of up?
 
Because gravity pulls them downward
 
Because objects are heavy
 
Because air pushes them down
 
Because the ground attracts them
A push or pull exerted on an object.
 
Force
 
Pitch
 
Speed
To use force to cause something to move closer.
 
Pull
 
Push
What happens when you drop a book?
 
It falls toward the ground
 
It disappears
 
It floats in the air
What is gravity?
 
A force that pulls objects toward the Earth
 
A force made by machines
 
A force that pushes objects upward
 
A force caused by air
Name the missing force....
 
normal force
 
weight force
 
frictional force
 
tension force
Why does the picture show you an applied force?
 
The girl moved the trolley by pulling it
 
The girl moved the trolley by pushing it
 
The girl do not move the trolley
 
The trolley have wheels to move forward and backward
In a force diagram, the arrow show ___
 
normal force
 
gravity
 
friction
The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:
 
normal force
 
applied force
A(n) _____ is a force applied by a person or object onto another object.
 
applied force
 
electric force
 
normal force
 
magnetic force
___ is the force which attracts or pulls all objects towards the Earth.
 
Gravity
 
Normal Force
 
Applied Force
 
Frictional Force
Which type of force is this?
 
Applied Force
 
Gravitational Force
 
Frictional Force
 
Balanced Force
A _____ is a support force.
 
Normal Force
 
Contact Force
 
Unbalanced Force
 
Balanced Force
In the force diagram this arrow indicates ___.
 
Gravity
 
Friction
 
Force
 
Normal Force
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