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science 1 Flashcards

1
Q

what is force?

A

Is a push, pull, twist movement

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2
Q

What is an unbalanced force?

A

when one force is bigger than the other

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3
Q

What is a balanced force?

A

is when 2 or more forces cancel eachother out

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4
Q

what is air resistance?

A

is an oppoising force to gravity

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5
Q

what is friction?

A

is a contact forcewhen two objects rub together and can cause heat

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6
Q

what is gravity?

A

gravity is a non-contact force that pulls an object down

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7
Q

what is magnetism?

A

is a non-contact force

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8
Q

what is mass?

A

the amount of matter an object has

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9
Q

what is weight?

A

is how heavy or how light an object is

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10
Q

what is Newtons (N)?

A

is used to measure forces

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11
Q

what is Newtons first law?

A

An object in motion will remain in motion, or an object at rest will remain at rest, unless acted upon by an external, unbalanced force

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12
Q

what is Terminal Velocity?

A

is the speed that a free-falling object will eventually reach

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13
Q

What is useful friction?

A

when you want friction to happen between the two objects

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14
Q

What is unwanted friction?

A

when you don’t want friction to happen between two objects

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15
Q

what is a lever?

A

A lever is a simple matchine that makes it easier to do things

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16
Q

what is a first class lever?

A

when the fulcrum is between the effort and the load (EFL)

17
Q

what is a second class lever?

A

when the load is between the effort and fulcrum (ELF)

18
Q

what is a third class lever?

A

when the effort is between the fulcrum and load

19
Q

what is a fulcrum?

A

is the piviot point in the lever

20
Q

what is the effort?

A

is the external force applied to lift or move the load

21
Q

what is the load?

A

is the object being moved by the lever

22
Q

what is sinking?

A

the object thats sinking displaces/pushes aside liquid

23
Q

what is floating?

A

the liquid pushes againest the object

24
Q

what is neutral buoyancy?

A

is when the buoyancy is equal to the weight

25
Q

what is density and its fromula?

A

Density is how much mass a substance has in a given space. the fromula is D=m/v

26
Q

what is buoyancy?

A

the buoyant force = weight of displayed fluid

27
Q

what is static friction?

A

prevents an object with out being pushed

28
Q

what is kenitic friction?

A

is a force that resists movement of an object

my flash cards (1 decks)

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