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Swing Problem
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A swing moves a distance of 2m from one side to the other
One complete swing movement takes π seconds.
The swing starts at point ‘A’ A
The equation for the distance d = Cos(4t) where t = time in seconds B B A
During the first 4 cycles how long is the swing at least 80cm from point ‘A’?

2. Home
Swing Problem
End
A swing moves a distance of 2m from one side to the other
One complete swing movement takes π seconds.
The swing starts at point ‘A’ A
0.8m
The equation for the distance d = Cos(4t) where t = time in seconds
d = 0.2 B B A
Find Total Time ‘T’
Solve 0.2 = Cos(4t)
During the first 4 cycles how long is the swing at least 80cm from point ‘A’?
time difference = 0.89
4t = Cos-1 0.2
4t = 1.37 or 4.91
T = 4 x 0.89
= 3.54 sec
t = 0.34 or 1.23