AP Physics – Love That Physics – 1
Who you are ___________________________________________________________________Per ___
This 'telephone' has too many shortcomings to be seriously considered as a means of communication. The device is
inherently of no value to us." -- Western Union internal memo.
1. A car travels along a straight section of road. A distance vs time graph illustrating its motion is
graphed to the right.
(a) Indicate every time t for which the cart is at rest.
x
(b) Indicate every time interval for which the speed of
the cart is increasing.
(c) What is the velocity from: a – b, b – c. c - d, d – e,
5
and e – f?
b
c
f
a
5
2. A position vs time graph is shown to the right.
Please analyze the graph and determine the
following. (a) The speed of the object from b
 c, (b) the speed from c  d, (c) the speed
from d  e, (d) the times t when the speed of
the object is zero, and (e) the points where the
direction of the object had to change (if any).
d
e
Position Time Graph
x
5
15
10
5
b
c
e
a
10
5
5
15
d
Position Time Graph
t
t
3. Three cars are traveling to Salado. The
distance to Salado from Belton is about 12 km.
In the following graph, the positions of three
cars are plotted vs time. Answer the following
questions.
a. Did all the cars leave from the same
location? If not rank them from closest to
farthest from Salado.
b. Are all the cars traveling at the same
speed? If not rank them from slowest to
fasting.
c. Rank the cars from who gets to Salado first
to last.
d. Do any of the cars pass each other? If so at what times.
4. A train leaves Austin going 20 km/hr north
toward Waco. Another train at the same
time leaves Waco going 30 km/hr south
toward Austin. Waco is located 150 Km
north of Austin.
a. Plot the position vs time for both trains
in the graph to the right.
b. When will the trains pass each other?