is the interaction between two or more objects. We use force to pull and to push.
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When do we use force?
We use it to slow down, speed up, stop or change the direction of a moving object.
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Which are the 2 types of forces?
Contact and non-contact force
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Define contact force
the body making the force is in physical contact with the object receiving the force
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Define the non-contact force
the body making the force is not in physical contact with the object that receives it.
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Which are the effects on bodies when force es applied? (3)
1. It can change the shape
2. Change the direction
3. Change the speed
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What is friction?
Friction is the interaction between bodies that are in contact
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Give an example of friction
answers may vary
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Give an example of gravity
answers may vary
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What gravity is
-Attracts the objects to the ground
-Gravity is the force by which our planet Earth pulls objects towards its center
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Talking about friction... What is the difference between smooth and rough surfaces?
Smooth surfaces (little friction)
Rough surfaces (a lot of friction)
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Define the magnetic force.
It is a non-contact force. When a magnet is near certain objects it attracts them
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Magnetic Force can repel. Explain this statement.
A magnet has a Norte Pole and a South Pole.When we hace N N or S S The magnetic force in this case causes repulsion, because the magnets do not come together.
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Magnetic Force can attract. Explain this statement.
When we have N S or S N: the magnetic force in this case causes attraction, because the magnets come together.