jordan (lj5655) – 3.7 – Arledge – (55100)
1
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001
10.0 points
The position oF a car being driven on a
straight road is given by
s
(
t
)=
1
3
(
t
2
+8)
3
/
2
as measured in Feet From some fxed point.
Determine the acceleration oF the car at
t
=1seconds
.
1.
acceleration = 4 Ft/sec
2
2.
acceleration =
10
3
Ft/sec
2
3.
acceleration =
8
3
Ft/sec
2
4.
acceleration = 3 Ft/sec
2
5.
acceleration =
11
3
Ft/sec
2
002
10.0 points
AFter
t
seconds the position oF a particle
moving along the
x
axis is given (in Feet) by
x
(
t
)=2s
in3
t
+5cos2
t,
t
≥
0
.
±ind the acceleration oF the particle when
t
=
π
.
1.
acceleration =

36 Ft/sec
2
2.
acceleration =

32 Ft/sec
2
3.
acceleration =

28 Ft/sec
2
4.
acceleration =

20 Ft/sec
2
5.
acceleration =

24 Ft/sec
2
003
10.0 points
AstormsystemisintheCentralTexasarea
and moving in a straight line through Austin.
The Weather Service O²ce Forecasts that
t
hours aFter 12noon the the storm will be a
distance oF
s
(
t
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 Spring '10
 Gualdini
 Imperial units, Yorkshire Television, RLM, storm speed

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