Forces!
What Is Force?
It takes a force to move something.
A force is a push or a pull . . .
that causes an object to move, stop, or change direction.
When you push an object, it moves away from you.
When you pull an object, it moves toward or with you.
Is this a push or a pull?
Is this a push or a pull?
Is this a push or a pull?
Is this a push or a pull?
Is this a push or a pull?
Is this a push or a pull?
Is this a push or a pull?
Is this a push or a pull?
What is the pulling force called?
Some Types of Forces
• Gravity • Friction
• Magnetism • Erosion (wind and water)
Gravity
Gravity:the force that pulls all objects in the universe towards each other’s center.
GravityThe mass of an object determines how much gravity that object has. For example:
The moon and Earth are pulling on each other. The Earth is bigger than the moon so its gravitational pull is stronger. That is why the moon orbits the Earth. What would happen if the moon was bigger than the Earth?
Friction
Friction . . .a force that acts against something when two surfaces rub against each other.
A softball player sliding into home on the rough dirt has a lot of friction and can stop.
A sled on smooth ice will keep sliding and is hard to stop because it has only a little friction.
What causes the leaves to fall to the ground during the Autumn season? magne
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avity
What causes the leaves to fall to the ground during the autumn season?
A.Magnetism
B.A pushing force
C.Gravity
D.Erosion
What causes the leaves to fall to the ground during the Autumn season? magne
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avity
The moving of an object is called --
A.force
B.friction
C.magnetism
D.gravity
What causes the leaves to fall to the ground during the Autumn season? magne
tismp
ushgr
avity
Which of the following is an example of a force that is different from gravity?
A. an apple dropping to the floor
B. a boy slamming a door
C. a leaf falling to the ground
D. water dripping from a faucet
What causes the leaves to fall to the ground during the Autumn season? magne
tismp
ushgr
avity
What force is represented in the above picture?
A. A pushing force
B. A pulling force
C. A magnetic force
D. Both A and C
May the Force Be With YouActivity Stations
Station 1:Building a Card House
You must use build a card house usingAll of the cards in the deck.
The house must be a minimum of 5 stories highwith 3 rooms on each floor.
Station 2: Marble Motion and ForcesBuild a ramp and roll a marble down a ramp. At the end of the ramp the marble pushes a cup until it stops on graph paper.
http://www.doingscience.org/physical-science-1-2-3/marbles-forces-and-motion
Instructional Video
Station 3: Force and Friction LabPull the following materials with the spring scale and
record your information
Station 4: Kerplunk!The object is to not let gravity pull the marbles to the tray!
Station 5: FORCE MOTION AND FRICTION RAMPS
Use the 3 ramps to record how a toy car moves along different surfaces.
