Physics 1, East Los Angeles College
Review Sheet,
TEST #1
Mr. V. Kiledjian
1) If you drive for 20 miles to the right in ½ hour, stop for a coffee break for 1 hr, and drive 42 miles to the
left in ¾ hour.
(Assume that the car is moving at constant speed and it is initially already moving,
and it doesn’t come to rest at the end)
a)
Find the average speed during the 1
st
stage, S
1
, 2
nd
stage, S
2
, and the total average speed, S
tot
b)
Find the average velocity during the 1
st
stage, V
1
, 2
nd
stage, V
2
, and the total average velocity, V
tot
c)
Find the average acceleration during the 1
st
stage, a
1
, 2
nd
stage, a
2
, and the total average acceleration, a
tot
d)
Draw graphs of
x vs. t,
v vs. t, s vs. t, and a vs. t.
On the graph of x vs. t and
v vs. t, show the
geometrical meaning of V
1Avg
, V
2Avg,
and V
avgTotal
.
On the graph of
v vs. t, show the geometrical
meaning of a
1Avg
, a
2Avg,
and a
avgTotal.
On the graph of
s vs. t, show the geometrical meaning of S
1Avg
,
S
2Avg,
and S
avgTotal.
On the graph of
a vs. t, show the geometrical meaning of
a
1Avg
,
a
2Avg,
and
a
avgTotal
2) If
x = (t – 1) (t – 4) meters and t is greater or equal to zero. Calculate the following.
0 < t < 6 seconds