physical science acceleration test
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35 Terms
what is acceleration?
change in velocity over time
what is distance?
total path traveled
what is displacement?
change in position
what is velocity?
speed with direction
which quantity includes direction?
velocity
what is the formula for speed?
distance over time
what is the formula for acceleration?
vf final - v initial over time
a person runs 100 ft and then 25 ft back. what is the total distance?
125 ft
a person runs 100 ft and then 25 ft back. what is the displacement?
75 ft
what does a flat horizontal line mean on a graph?
no movement
what does a steeper slope on a distance-time graph mean?
faster speed
a downward sloping line on a graph shows :
moving back toward the start
what does constant speed look like on a graph?
straight line with constant slope
if an object changes directions its _ changes
velocity
an object travels 50m in 10s. what is its sped?
5 m/s
an object goes from 0 m/s to 18 m/s in 6 s. what is its acceleration?
3 m/s2
average velocity uses :
displacement over time
which situation has zero displacement?
walking in a circle and standing where you started
which is an example of acceleration?
a car turning a corner
what happens when speed gradually increases?
acceleration
what happens when speed gradually decreases?
deceleration
which unit is commonly used for speed?
m/s
which unit is used for acceleration?
m/s2
if an object does not move, its speed is :
0 m/s
if distance increases while time stays the same, speed will :
increase
which graph line represents the fastest motion?
steepest slope
if displacement is negative, the object moved :
backward from the starting point
speed is a _ quantity
scalar
velocity is a _ quantity
vector
which statement about distance and displacement is true?
displacement includes direction
what does a curved line on a distance-time graph usually show?
changing speed
a car travels 120 miles in 2 hours. what is its average speed?
60 mph
which object has the greatest acceleration?
an object rapidly increasing speed
if an object returns to its starting point, the displacement is :
0
what happens to velocity if only direction changes?
it changes