Motion Flashcards
What is weight?
Total force applied downward toward Earth
What is the center of gravity?
The center of mass distribution, and if something is placed directly above or below an object’s center of gravity, it will balance
What is buoyant force?
The upward force that a fluid exerts on an object
What is Archimedes Principle?
Says that the buoyant force is equal to the weight of the fluid displaced
What is the waterline?
A line painted on a hill which shows the point to which a boat sinks when it is properly trimmed
What is the bow?
Very front of the boat, the pointy end
What is the stern?
The very back of the boat or the aft end
What is the port?
The left side of the boat when looking toward the bow
What is starboard?
The right side of the boat when looking forward toward the bow
what is LOA?
Abbreviation for length overall, longest measure of a boat from bow to stern
What is LWL
Abbreviation for length at the waterline, length if the boat from bow to stern measured at the waterline
What is the beam?
The widest point of the boat measured from one side if the boat to the other side of the boat
What is the hull?
The body of the boat including all the individual parts
What is the keel?
The lowest member if the boats framework, assists with the stability of the boat
What are the ribs?
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
What is the gunwale?
The very top edge of the side of the boat
What is the transom?
The flat end of back of the boat, the stern end
What is the stem?
The framing member of the hull that forms the bow of the boat
What is the thwart
The transverse bench seat in a small boat, also provides structural strength to side in a boat
What is a sheer?
The upward curve of the top edge of the hull from the middle of the boat to the ends
What is freeboard?
The distance from the water line to the top of the gunwale, a part if the hull that is above the waterline
What is speed formula?
Speed=distance/time
What is the SI unit for speed?
Meters per second
What is the formula for acceleration?
Final velocity-starting velocity/
Time it takes to change velocity
What is centripetal acceleration?
Where you travel around in a circle, always accelerating, because you are constantly changing directions which counts as accelerating
What is a force? Unit?
A push or a pull
Newtons (N)
What is net force?
The combined forces on an object
What is inertia?
The impulse for objects to resist a change in motion
What is Newtons First Law of Motion?
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
What is Newtons Second Law?
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
What is Newtons Third Law?
For every action there is an equal and opposite reaction
Give an example of each law if motion
First: The penny and the card
Second: Different sized beads
Third: Balloon and straw
What is speed?
The distance traveled by an object divided by the time taken to travel that distance.
What is velocity? Unit?
The speed of an object in a certain direction
Ex: km/h south
What is acceleration? What is it’s unit?
It is the rate at which velocity changes
Unit: m/s2 south
What is momentum? What is it’s unit?
It is a quantity defined as the product if the mass and velocity of an object
Kg • m/s
What is the formula for momentum?
p=m • v
m is mass
v is velocity
p is momentum
What is motion?
An objects change in position relative to a reference point
How do you find the resulting velocity if two velocities?
Add them together
What is the equation for force?
F= m x a
m is mass
a is acceleration
F is force
What happens if the buoyant force and weight are the same? If weight is more?
If they are the same the object floats and is suspended in the water. If it weighs more, it sinks
How do you change your density? (3)
Changing shape, changing mass, and changing volume
