58 terms

x-direction

In one dimension motion, left to right measures components in this direction.

y-direction

In one dimension motion, up and down measures components in this direction.

displacement

change in position

Xf-Xi

Formula for displacement

meters

Units for discplacement

distance travelled

Displacement is NOT this.

positive or negative

Displacement can be this or this.

(ΔX)/(ΔT)

Velocity equation

Displacement by Time

Velocity is this divided by this.

Acceleration

The rate at which velocity changes

speed and/or direction

An object accelerates if it's these two things change.

(ΔV)/(ΔT)

Acceleration equation

Velocity by Time

Acceleration is this divided by this.

Kinematic

One uses these equations for motion with constant acceleration.

0

If something slows down, it's Vf is this.

0

If something starts at rest, it's Vi is this.

velocity

Position vs. Time Graphs tell you an object's....

acceleration

A velocity vs. time graphs tells you an object's...

discplacement

The area under a curve for a velocity vs. time graph is it's....

constant acceleration

Free-falling objects undergo this.

air resistance

There is no this in free fall, they are in a vacuum, such as space

acceleration due to gravity

Ag, or -9.81m/s² stands for...

m/s

Units for Velocity

m/s²

Units for acceleration

-9.81 m/s²

Acceleration due to gravity on earth

downward

Direction of object's acceleration is this even if the object is moving in an upward way.

0

If a ball is thrown upward, it's Velocity at the top is this.

Vi and Vf

If a ball is thrown upward, these two things are the same.

-9.81m/s²

If a ball is thrown upward, this is it's Ag.

speeds up

If the velocity and acceleration are in the same direction, the object [speeds up/slows down].

slows down

If the velocity and acceleration are in opposite directions, the object [speeds up/slows down].

acceleration

If a ball is thrown upward, it has [velocity/acceleration] at the top.

directions

If a ball is thrown upward, the initial and final velocities are the same, but these are opposite.

0

If something is being dropped, it's Vi is this.

magnitude but no direction

A scalar quantity has....

magnitude and direction

A vector quantity has..

speed, volume, area, temperature

Examples of scalar quantities

displacement, velocity, acceleration, force

Examples of vector quantities

resultant

Vector that represents the sum of two or more vectors.

furthest

An angle's name is always the [closest/furthest] direction followed by the other.

a²+b²=c²

Pythagorean theorm

hypotenuse/displacement, direction

The resultant displacement includes these two things.

instantaneous speed

A speedometer on your car gives you the...

negative

If something is falling, it's vertical change will always have a this in front of it.

constant and negative

A slope for the graph of a ball thrown vertically in the air should have a line pertaining to these two characteristics.

influence of gravity

Projectiles are objects that have been thrown or launched into the air and are subject to the this

0

In a full arc of a projectile motion, the Vy at the peak is this.

-9.81 m/s²

The Ay for a projectile motion is this.

0 m/s²

Ax for projectile motion is this.

ΔX = 1/2(Vi+Vf)t

This kinematic equation cannot be used for projectiles.

Negative

The Y value for any horizontal launch (if it is traveling down) will always be this.

Viy, Ax, ay

These things are always constant for horizontal projections.

Vi²=Vix²+Viy²

The hypotenuse can be calculated with this formula for projectiles.

Vix

For a horizontal projectile, the initial velocity of the projectile will always be this variable.

time

Normally, when dealing with projectiles, this will have to be calculated first.

constant speed

The Ax is always 0 when you are at a...

0

The Vfy for launched projectile motions will always be this.

multiply time by 2

When dealing with projectile motions, you can't forget to do this.