102
Obtaining tensions of strings
Suppose a bar is hung from the ceiling by two strings such that it balances
with angles the strings make from the perpendicular lines A and B. If the
weight of the bar is W, obtain the tensions in the strings S and T.
1.
Press
b
2
1
0
to open a window for creating a NEW
program.
2.
Type TENSION for the title then press
e
.
• A NEW program called ‘TENSION’ will be created.
3.
Enter the program as follows.
Program code
Key operations
Print“ANGLES
i
1
@
a
ANGLES
;
e
Input A
i
2
;
A
e
Input B
i
2
;
B
e
Print”WEIGHT
i
1
@
a
WEIGHT
;
e
Input W
i
2
;
W
e
C=AΩDEG
;
C
;
=
;
A
@
:
e
D=BΩDEG
;
D
;
=
;
B
@
:
e
W
T
S
B
A
Perpendicular
line
W
T
S
B
A
—— = —— = —————
T = W —————
S = W —————
where W:
weight
T, S: tension in strings
A, B: angles that strings make
from perpendicular lines
(DMS)
G:
gravity
S
sin A
T
sin B
W
sin (A + B)
sin B
sin (A + B)
sin A
sin (A + B)
G
Chapter 8: Application Examples
Summary of Contents for EL-5230
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