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Physic Unit 1 - Coggle Diagram
Physic Unit 1
Magnetic forces:
A magnet is any object that can attract other materials with magnetic properties through a magnetic force.
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A pair of magnets. To show opposite pole attraction, the poles are lined up so the north pole of one magnet is next to the south pole of the other magnet. There is an arrow from each magnet pointing towards the other.
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A pair of magnets. To show poles repelling, the south poles of both magnets are next to each other. There is an arrow from each magnet pointing away from the other.
The strength of a magnetic force depends on the strength of the magnets and the distance between magnetic objects.
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Also, the magnetic force is stronger when objects are closer together.
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Electric forces:
An electric force exists between any two objects with electric charge—even if the objects aren’t touching.
Electric forces can be attractive or repulsive. This depends on the electric charges of the objects.
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Two equally sized foam balls separated by a short distance. The ball on the left has a plus sign on it and an arrow pointing right from its right side. The ball on the right has a minus sign on it with an arrow pointing left from its left side.
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Two equally sized foam balls separated by a short distance. Both balls have a plus sign on them. There is an arrow pointing left from the left side of the ball on the left. There is an arrow pointing right from the right side of the ball on the right.
The electric force between two objects depends on the size of their charges and the distance between them. The greater the charges and the smaller the distance, the larger the electric force.
Forces and acceleration:
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When there is a net force on an object, the object will change speed in the direction of the net force. The object’s acceleration tells us how much it speeds up or slows down.
The acceleration of an object depends on the size of the net force pushing or pulling it and the mass of the object.
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Gravitational forces:
The force of gravity, or gravitational force, pulls objects with mass toward each other.
We often think about the force of gravity from Earth. This force is what keeps your body on the ground.
But any object with mass exerts a gravitational force on all other objects with mass. For example, there is a gravitational force between you and every object around you!
The gravitational force between two objects is larger when the masses of the objects are larger. That’s why you can feel the gravitational force between you and Earth, but the force between you and objects with smaller masses is too weak to feel.
The gravitational force between two objects also depends on the distance between their centers. The further objects are from one another, the weaker the force is.
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Representing motion:
A reference frame is the point of view that you observe and measure things from. It is used to help define the motion or position of an object.
Two people can have different reference frames of the same situation. If this happens, they will observe the motion and position of an object differently.
Units are a way to describe a measurement. They allow us to describe things, like an object’s speed, mass, or position, in a consistent way.
Scientists need to communicate data in a clear way. They do this by sharing the units and reference frame they use to take measurements.