Units And Dimensions Flashcards
Pico (p)
10^-12
Nano-(n)
10^-9
Micro- (u)
10^-6
Milli-(m)
10^3
Centi- (c)
10^-2
Kilo-(k)
10^3
Mega-(M)
10^6
Giga-(G)
10^9
Displacement
An objects change in position
Is displacement a vector?
Yes, it takes into account direction
Total distance traveled is not the same as
Displacement
Velocity always points in the same direction as
Displacement
Velocity tells us
How fast an objects position is changing
Speed
The magnitude of the velocity vector
Velocity is
Speed plus direction, so if two objects velocities are the same so are their speeds
Acceleration tells us
How fast an object’s velocity changes
Can an object accelerate if its speed is constant?
Yes,acceleration is change in velocity
Ball at the top will be acceleration although its velocity will be zero
If the acceleration points in the same direction as the initial velocity
The objects speed is increasing
If acceleration is perpendicular to velocity an objects speed
Is constant
If acceleration is in the opposite direction from velocity that means
The objects speed is decreasing
If acceleration is at an angle between 0-90 to the velocity the objects speed
Is increasing and direction of v is changing
If acceleration is at an angle between 90-180 to velocity the objects speed is
Decreasing and direction of v is changing
Missing a
D = 1/2(Vo+V)t
Missing d
V=Vo + at
Missing v
D=Vot+1/2at^2
Missing Vo
D=vt-1/2at^2
Missing t
V^2=Vo^2+2ad
A quantity is missing when
It’s not given or asked for
The slope of a position vs time graph
Gives velocity
The slope of a velocity vs. time graph gives the
Acceleration
The area under a velocity vs. time graph gives
Displacement
Or use Big 5 #1 : d=1/2(Vo+V)t
The Big Five is used only
In situations where the acceleration is constant
If the horizontal acceleration is zero throughout the projectiles flight
The horizontal velocity will be constant throughout the flight
