11.2 speed Flashcards
1
Q
instantaneous speed
A
the rate at which an object is moving at a given point in time
2
Q
what measures instantaneous speed?
A
a speedometer
3
Q
a slope on a DISTANCE TIME graph indicates…?
A
speed
4
Q
a slope on a VELOCITY graph indicates…?
A
acceleration
5
Q
what is an example of a vector quantity?
A
acceleration and force
6
Q
what is acceleration?
A
the rate at which velocity changes
7
Q
what can acceleration be caused by?
A
a positive or negative change in speed
8
Q
acceleration unit for gravity?
A
9.8 m/s2
9
Q
unit for acceleration
A
m/s2
10
Q
unit for speed
A
m/s
11
Q
if velocity increases, acceleration is…
A
positive
12
Q
if velocity decreases, velocity is…
A
negative
