# A position vs. time graph is shown below.

```A position vs. time graph is shown below.
If the average velocity from point A to
point C is is 2 m/s then:
A position vs. time graph is shown below.
x
t
A. Average velocity from
A to B is 2 m/s
Which one is the corresponding velocity vs.
time graph?
B. Instantaneous
velocity at A is 2 m/s
v
v
C. Instantaneous
velocity at B is 2 m/s
v
(A)
t
v
t
Which one is the corresponding acceleration
vs. time graph?
a
a
(A)
(B)
(C)
What is the acceleration of the rocket
when the engine is on? (taking vectors
pointing up to be positive)
A. -7.80 m/s2
B. 2.00 m/s2
C. 9.80 m/s2
t
t
t
D. -9.80 m/s2
E. 11.8 m/s2
A model rocket is launched straight upward with an
initial speed of 50.0 m/s. It accelerates with a constant
upward acceleration of 2.00 m/s2 until its engines stop
at an altitude of 150 m.
What is the acceleration of the rocket
when the engine is off? (taking vectors
pointing up to be positive)
A. -7.80 m/s2
B. 2.00 m/s2
C. 9.80 m/s2
D. -9.80 m/s2
E. 11.8 m/s2
t
t
A model rocket is launched straight upward with an
initial speed of 50.0 m/s. It accelerates with a constant
upward acceleration of 2.00 m/s2 until its engines stop
at an altitude of 150 m.
A velocity vs. time graph is shown below.
a
(C)
(B)
```