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study/reviewing place > 1st qrt grade 8 science reviewer > Flashcards

1st qrt grade 8 science reviewer Flashcards

1
Q

a push or pull that changes an objects state of rest or motion

A

Force

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2
Q

two forces with the same amount of power are applied in opposite directions

A

Balanced force

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3
Q

when one of the two forces applied in opposite direction is greater than the other

A

Unbalanced force

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4
Q

forces that act between two objects that are physically touching each other

A

Contact force

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5
Q

forces that contact between two objects without them physically touching each other

A

Non-contact force

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6
Q

a force that happens when two surfaces rub againts each other

A

Friction

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7
Q

a force when something happens when something tries to slowdown or stop another thing from moving

A

Resistance

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8
Q

force that happens when an object is pulled from opposite directions by two forces

A

Tension force

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9
Q

a force when one object pushes or pulls on an object

A

Applied force

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10
Q

force that pulls an object towards eachother

A

Gravity

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11
Q

a type of non contact force that acts between magnets or megnetic objects

A

Magnetic force

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12
Q

force between two objects that have an electric charge

A

Electrostatic force

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13
Q

The four types of friction are?

A

static, rolling, fluid, and sliding

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14
Q

a friction that happens when an object is not moving and is touching a surface.

A

Static friction

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15
Q

a friction that happens when two objets slide past each other

A

Sliding friction

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16
Q

a type of friction that occurs when a round object like a ball or a wheel, rolls over a surface.

A

Rolling friction

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17
Q

a type of friction that happens when an object moves through a fluid like air or water.

A

Fluid friction

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18
Q

the four types or kinds or aspects of gravity are?

A

attracting, universal, grounding,and non contact

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19
Q

it is a rule of gravity that explains how gravity works in the entire universe

A

Gravity is universal/ universal

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20
Q

gravity is (Blank) it is a force that exists between objects, even if they are not touching each other

A

gravity is non-contact / non-contact

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21
Q

what type of gravity that states gravity is a force that keeps everything anchored to Earth, pulling objects downwards

A

Gravity is grounding / grounding

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22
Q

what impact can forces have on objects (give atleast 3 of them)

A

It can make it move, stop it, make it speed up, cause it to change directions, make it slowdown, and cause it to change shape.

23
Q

who is Isaac Newton

A

He is a renowned physicist and mathematician from england who discovered in 1687 the correlation between force and motion.

24
Q

He is a renowned physicist and mathematician from england who discovered in 1687 the correlation between force and motion.

A

Isaac Newton

25
Q

What does Newtons first law of motion states

A

States an object at rest will stay at rest unless acted on by an unbalanced force.

26
Q

It is the law that states an object at rest will stay at rest unless acted on by an unbalanced force.

A

Newtons first law of motion

27
Q

it is the tendency to resist change in a state of motion

A

Inertia

I love the song inertia by AJR

28
Q

what is Inertia?

A

inertia is the tendency to resist change in a state of motion

29
Q

what is the measurement of inertia

A

Mass

30
Q

What are the two types of equilibrium

A

Static and dynamic equilibrium

31
Q

its is a law that states the acceleration of an object by a force is inversely proportional to the mass of the object and directly proportional to the force or has the formula : F=ma

A

Newtons Second Law of motion

32
Q

What does Newtons Second Law of motion states

A

its is a law that states the acceleration of an object by a force is inversely proportional to the mass of the object and directly proportional to the force or just has the formula: F=ma

33
Q

It is a law that states that every action, there is an equal and opposite reaction.

A

Newtons Third law of motion

34
Q

What does Newtons Third law of motion states

A

It is a law that states that evry action, there is an equal and opposite reaction.

35
Q

What is axis x

A

cos

36
Q

What is axis y

A

sin

37
Q

What does FBD stand for

A

Free Body Diagram

38
Q

what is the submission of x and y

A

Σ

39
Q

What does the T stand for in T1, T2, and T3

A

Tension

40
Q

What is the formula for single angle Σfx

A

Σfx = T1cosθ - T2=0

41
Q

What is the formula for single angle Σfy

A

Σfy = T1sinθ - T3=0

42
Q

How do you solve for T3

A

By using the formula m x g (m = mass g= gravity which is 9.8m/s^2)

43
Q

What does this symbol mean θ

A

Theta or Angle

44
Q

which formula are you going to do next in single angle once you got T3

A

Σfy

45
Q

what formula is next after solving Σfy in single angle

A

Σfx

46
Q

what formula do you use to check your answer if its correct in single angle.

A

Σfy

47
Q

What is the formula for same/double angle Σfy

A

Σfy = T1sinθ + T2sinθ - T3 = 0

48
Q

What is the formula for same/double angle Σfx

A

Σfx = T1cosθ - T2cosθ = 0

49
Q

What is the first thing you solve for in double/ same angle

A

T3

50
Q

What formula do you do or perform next after you solved for T3 in Double/same angle

A

Σfy

51
Q

What is the new formula or derived form for Σfy in same /double angle

A

2Tsinθ - T3 = 0

52
Q

What formula do we use for checking double/same angle

A

Σfy

53
Q

What is the derived formula of Σfx in Single angle

A

T1 = T3/sinθ

54
Q

What is the derived formula of Σfy In Single angle

A

T1sinθ = T2

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