Scalars & Vectors
Position, Velocity, & Acceleration
Motion Graphs
Kinematic Equations
Vertical Motion & Gravity
100
What is a scalar quantity?
A quantity with only magnitude.
100
Define position
The location of an object
100
What does the slope of a position-time graph represent?
Velocity
100
What does “Δ” (delta) mean in equations?
Change in a quantity
100
What is the acceleration due to gravity on Earth?
9.8 m/s² downward.
200
Give two examples of vector quantities.
Velocity
Displacement
Acceleration
Force.
200
What does acceleration measure?
The rate of change of velocity over time.
200
What does a flat line on a position-time graph mean?
The object is at rest (no motion).
200
What is the symbol for initial velocity?
V0 or Vi
200
Who proved that fall time is independent of mass?
Galileo
300
What makes velocity different from speed?
Velocity has direction; speed does not.
300
What is the difference between uniform and non-uniform motion?
Uniform = constant speed/direction
Non-uniform = changes in speed or direction.
300
What does a steeper slope mean on a position-time graph?
The object is moving faster.
300
State one of the kinematic equations.
300
What is the velocity of an object at its maximum height when thrown upward?
0 m/s
400
If a person walks 3 blocks east and 4 blocks west, what is their displacement?
1 block west
400
If a car moves 85 m in 45 s, what is its speed?
1.89 m/s
400
What does the area under a velocity-time graph represent?
Displacement
400
If an object starts from rest and accelerates at 3 m/s² for 4 s, what is its final velocity?
12 m/s
400
If an object is thrown upward, how does its time up compare to time down?
They are equal (symmetrical).
500
How are vectors represented visually?
With arrows: length shows magnitude and direction shows direction.
500
If an object changes direction but not speed, is it accelerating?
Yes, because acceleration is a change in velocity (which includes direction).
500
How can you tell if velocity is negative from a position-time graph?
The slope of the line is negative (downward).
500
What does it mean if acceleration equals zero?
The object moves at constant velocity.
500
An object is thrown upward at 30 m/s. How long until it reaches its peak?
a = v/t
t = v/ag
t = (30m/s) / (9.8 m/s2)
≈ 3.06 seconds