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Science > Motion > Flashcards

Motion Flashcards

0
Q

What is weight?

A

Total force applied downward toward Earth

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1
Q

What is the center of gravity?

A

The center of mass distribution, and if something is placed directly above or below an object’s center of gravity, it will balance

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2
Q

What is buoyant force?

A

The upward force that a fluid exerts on an object

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3
Q

What is Archimedes Principle?

A

Says that the buoyant force is equal to the weight of the fluid displaced

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4
Q

What is the waterline?

A

A line painted on a hill which shows the point to which a boat sinks when it is properly trimmed

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5
Q

What is the bow?

A

Very front of the boat, the pointy end

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6
Q

What is the stern?

A

The very back of the boat or the aft end

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7
Q

What is the port?

A

The left side of the boat when looking toward the bow

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8
Q

What is starboard?

A

The right side of the boat when looking forward toward the bow

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9
Q

what is LOA?

A

Abbreviation for length overall, longest measure of a boat from bow to stern

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10
Q

What is LWL

A

Abbreviation for length at the waterline, length if the boat from bow to stern measured at the waterline

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11
Q

What is the beam?

A

The widest point of the boat measured from one side if the boat to the other side of the boat

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12
Q

What is the hull?

A

The body of the boat including all the individual parts

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13
Q

What is the keel?

A

The lowest member if the boats framework, assists with the stability of the boat

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14
Q

What are the ribs?

A

The framework pieces of the boat that are connected to the keel at the bottom and the deck or gunwale at the top, defines the shape or curve of the hull

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15
Q

What is the gunwale?

A

The very top edge of the side of the boat

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16
Q

What is the transom?

A

The flat end of back of the boat, the stern end

17
Q

What is the stem?

A

The framing member of the hull that forms the bow of the boat

18
Q

What is the thwart

A

The transverse bench seat in a small boat, also provides structural strength to side in a boat

19
Q

What is a sheer?

A

The upward curve of the top edge of the hull from the middle of the boat to the ends

20
Q

What is freeboard?

A

The distance from the water line to the top of the gunwale, a part if the hull that is above the waterline

21
Q

What is speed formula?

A

Speed=distance/time

22
Q

What is the SI unit for speed?

A

Meters per second

23
Q

What is the formula for acceleration?

A

Final velocity-starting velocity/

Time it takes to change velocity

24
Q

What is centripetal acceleration?

A

Where you travel around in a circle, always accelerating, because you are constantly changing directions which counts as accelerating

25
Q

What is a force? Unit?

A

A push or a pull

Newtons (N)

26
Q

What is net force?

A

The combined forces on an object

27
Q

What is inertia?

A

The impulse for objects to resist a change in motion

28
Q

What is Newtons First Law of Motion?

A

An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line, unless acted on by an unbalanced force

29
Q

What is Newtons Second Law?

A

Acceleration is produced when a force acts on a mass. The greater the mass of the object to be accelerated the greater the amount of force needed to accelerate the object

30
Q

What is Newtons Third Law?

A

For every action there is an equal and opposite reaction

31
Q

Give an example of each law if motion

A

First: The penny and the card
Second: Different sized beads
Third: Balloon and straw

32
Q

What is speed?

A

The distance traveled by an object divided by the time taken to travel that distance.

33
Q

What is velocity? Unit?

A

The speed of an object in a certain direction

Ex: km/h south

34
Q

What is acceleration? What is it’s unit?

A

It is the rate at which velocity changes

Unit: m/s2 south

35
Q

What is momentum? What is it’s unit?

A

It is a quantity defined as the product if the mass and velocity of an object
Kg • m/s

36
Q

What is the formula for momentum?

A

p=m • v
m is mass
v is velocity
p is momentum

37
Q

What is motion?

A

An objects change in position relative to a reference point

38
Q

How do you find the resulting velocity if two velocities?

A

Add them together

39
Q

What is the equation for force?

A

F= m x a
m is mass
a is acceleration
F is force

40
Q

What happens if the buoyant force and weight are the same? If weight is more?

A

If they are the same the object floats and is suspended in the water. If it weighs more, it sinks

41
Q

How do you change your density? (3)

A

Changing shape, changing mass, and changing volume

Science (17 decks)

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