Sharp EL-5230 User Manual
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.
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.
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
e
Input A
i 2 ; A e
Input B
i 2 ; B e
Print”WEIGHT
i 1 @ a WEIGHT ;
e
e
Input W
i 2 ; W e
C=AΩDEG
; C ; = ; A @ :
e
e
D=BΩDEG
; D ; = ; B @ :
e
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
A, B: angles that strings make
from perpendicular lines
(DMS)
(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