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52 Cards in this Set
- Front
- Back
a push or a pull
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force
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a change in position
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motion
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the measure of how fast something moves over a certain distance
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speed
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the force that pulls objects towards each other
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gravity
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the measure of the pull of gravity on an object
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weight
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examples of pushes
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push a chair
push a car roll a ball push a cart push a lawnmower |
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examples of pulls
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pull a door
pull a string pull a truck tailgate pull a toy |
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What are some forces?
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push or pull
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What causes motion?
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a force
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Put in order from least to greatest speed:
person biking race car person walking race horse |
person walking
person biking race horse race car |
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What does weight measure?
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the effects of gravity on an object
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What would be a strong force?
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gravity
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How are the motions of a car and plane alike?
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motion caused by a force
change in position |
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How are the motions of a car and plane different?
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Different speeds
Use different force to move |
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What is the result of unbalanced forces?
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motion
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What is the result of balanced forces?
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nothing happens
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Two cars travel the same distance. What would tell you that one car had a faster speed than the other car?
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The car that gets there first has the faster speed.
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Where is gravity greater, on Earth or the moon?
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The Earth because earth has more mass than the moon.
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Where would your weight be greater, on Earth or the moon?
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On Earth because the moon is smaller (less gravity).
If you weighed 100 pounds on earth, you would weigh 16.6 pounds on the moon. |
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Work or no work:
Push a roller chair across the room |
Work
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Take a crayon out of the crayon tub
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work
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Kick a ball
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work
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Write a number on the chalkboard
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work
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Turn the pages and read a book
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work
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Watch a video
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no work
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Push against the chalkboard with your hand
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no work
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Walk to the door
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work
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Don't move. Sit where you are
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no work
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Read the words on the bulletin board
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work
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Write your name using a computer
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work
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Ride in a car
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no work
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Where are forces?
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Forces are all around us. They allow us to run, throw a ball, or ride a bicycle.
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T/F
If an object is at rest, it will remain at rest forever? |
False. It will remain at rest until a force (push/pull) is applied to it.
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T/F
An object in motion will continue to move in a straight line at a constant speed unless a force acts on it. |
True
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T/F
When the force on an object is decreased, the speed increases. |
False.
Increase in force causes increase in speed |
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A force caused by two objects rubbing against each other
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Friction
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T/F
The motion of an object is affected by friction. |
True
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A force that gives things weight and makes them fall.
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Gravity
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T/F
The motion of an object is not affected by gravity. |
False
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T/F
A force can change the direction an object is moving. |
True
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T/F
A force cannot change the shape of an object. |
False
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A cyclist pedals harder to pass another cyclist.
Force Fact: |
When the force on an object is increased, the speed increases.
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A diver bounces off a diving board and plunges down into the water.
Force Fact: |
The motion of an object is affected by gravity.
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A golfer putts a ball into the cup at the 18th green.
Force Fact: |
If an object is at rest, it will remain at rest until a force is applied to it.
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A tennis player hits a ball back into his opponent's court.
Force Fact: |
A force can change the direction of an object is moving.
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A baseball player slides into third base.
Force Fact: |
The motion of an object is affected by friction.
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A race-car driver turns the steering wheel of her car as she moves around the track.
Force Fact: |
A force can change the direction an object is moving.
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A bicycle tire fills with air.
Force Fact: |
A force can change the shape of an object.
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A race-car driver slams on the brakes.
Force Fact: |
An object in motion will continue to move in a straight line at a constant speed unless a force acts on it.
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A football player kicks a field goal.
Force Fact: |
If an object is at rest, it will remain at rest until a force is applied to it.
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A soccer goalie saves a goal.
Force Fact: |
An object in motion will continue to move in a straight line at a constant speed unless a force acts on it.
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T/F
I like getting good grades on tests? |
????
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