# Science - forces and their effects

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Name the forces
Normal force/ support force, Gravity, friction, magnetic force, upthrust, surface tension, air resistance and tension course
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What is contact force?
Occurs when objects contact with each other
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What is non contact force?
Occurs when objects do not contact each other
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Is normal force contact or no contact force?
Contact force
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Gravity?
Non contact force
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Friction?
Contact force
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Magnetic force?
Non contact force
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Upthrust?
Non contact force
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Surface tension?
Non contact force
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Air resistance ?
Contact force
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Tension course ?
Non contact force
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What is deformation?
When the force is removed the object changes shape for a period of time
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What is elastic deformation?
When the force is removed the object goes back to its original shape
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What is plastic deformation?
When the force is removed the object CANNOT return to its original shape
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What is used to measure forces?
A Newton meter
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What 5 things can forces make objects do?
Speed up, slow down, change direction, turn, change shape
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How can you show the direction of a force?
With an arrow, the longer the arrow the greater the size of the force
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What is a balanced force?
When a force on an object has the same size in the forward and backward force
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What will the object do if it has a balanced force?
The object will stay stationary or move in the same direction at the same speed
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If the forwards force is greater than the backwards force what will the object do?
Speed up
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If the backwards force is great her than the forwards force what will the object do?
Slow down
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What is a resultant force?
The resultant force is a sum of all forces acting on an object
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What is friction?
Friction is a force that acts on 2 surfaces when they move against each other.
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What 2 things can friction do to an object?
Friction can either stop an object from moving or slow it down
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When does friction occur?
Friction occurs when surfaces are bumpy even if that cannot be seen by your eyes
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How can friction be reduced?
By oil
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How can friction be increased?
By carpet or sandpaper
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When is friction usefull?
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When is friction not usefull?
When you want to move an object across a rough surface
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## Other cards in this set

### Card 2

#### Front

What is contact force?

#### Back

Occurs when objects contact with each other

### Card 3

#### Front

What is non contact force?

### Card 4

#### Front

Is normal force contact or no contact force?

Gravity?