Chapter 3- Vector Quantities and Projectile Motion Flashcards
What is constant velocity?
When an object is traveling the same distance every second
What does moving at a constant velocity due to position, displacement, speed or velocity, and time?
Position: Changes at the same rate every second
Displacement: changes constantly at the same rate
Velocity: stays the same the whole time
Time: Every second the object is in a different position
What equation do you use for Position vs Time Graphs?
Xf=Xi+V(△T)
What equation do you use for Velocity vs Time Graphs?
Vf=Vi+A(△T)
What is acceleration?
The rate at which velocity is changing
How does acceleration affect position, velocity, direction, and time?
Position: Changes at a non constant rate since the speed of the object is changing
Velocity: Is constantly changing (at a constant rate sometimes)
Direction: When direction changes your velocities direction changes which is an acceleration
Time: Every second the object is in a different position
What is constant acceleration?
A change in an objects velocity by the same amount every second
When does an object have a velocity of 0 and also have an acceleration?
When the object is stopping
What is free fall?
An object moving downward, upward, or horizontally experiences Earth’s gravity
What is a right triangle?
A triangle that has two sides that are perpendicular and make a 90 degree angle. This allows us to use pythagorean theorem and Sine, Cosine, Tangent
What are Sine, Cosine, and Tangent?
Sine: Opposite over Hypotenuse
Cosine: Adjacent over Hypotenuse
Tangent: Opposite over Adjacent
What is a vector?
A quantity with both magnitude and direction
How are vectors shown?
A line pointing at a certain direction on a X,Y coordinate plane with the angle shown
How do you combine vector?
You add them
What is a vector component and how are they calculated?
They are the amount of horizontal motion and vertical motion that make up a vector quantity. You find them by using sine and cosine
How are vector components used in combining vectors?
You can add them together to get the components of the vector they combine to make.
What is a projectile?
An object moving through the air, only under the influence of gravity (air resistance is neglected)
Why do we consider horizontal and vertical motion separately?
Vertical motion and horizontal motion don’t affect each other
What equations represent the horizontal motion of a projectile?
Vfx=Vix=A(△T)
△X=1/2(Vix+Vfx)△T
△X=Vix△T+1/2A(△T)^2
Vfx^2=Vix^2+2A△X
What equations represent the vertical motion of a projectile?
Vfy=Viy=A(△T)
△Y=1/2(Viy+Vfy)△T
△Y=Viy△T+1/2A(△T)^2
Vfy^2=Viy^2+2A△X
What is relative motion?
The velocity of one vector with respect to another vector
