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Ti36eng1.doc TI-36X II Manual Linda Bower Revised:
01/10/03 10:47 AM Printed: 01/10/03 10:47 AM Page 29 of
48
³
Problem
A brick falls off the roof of a building and hits the
sidewalk
3.5
seconds later. Find the height of the
building in meters and then in feet, rounded off to the
nearest whole number.
The formula for distance fallen is
y=
L
1
2
g
t
2
where
t
= time in seconds, and
g
=gravitational
acceleration (
9.80665
meters per second-squared). We
measure the
y
coordinate from the position where the
brick began its fall, and we specify that
y
is positive
upwards.
J
1
1
2
<
L
1
ç
2
è
%]"
c g h N
A
R
Þ
9.80665
VV
M
1
ç
2
è
g
ß
L
4.903325
<
3
I
5
PV
Ans
è
3.5
2
ß
L
60.06573125
%t
0
Ans
è
3.5
2
ß
L
60.
."VV
Ans m
Þ
ft
ß
L
197
The height of the building is 60 meters or 197 feet.