ENES 100 – Week 13

1.    The solution to a vibration system can be written as a dimensionless function 


g(t) = e-k*n*t sin((1-k2)1/2 *n*t) 
              

where t is the time in seconds, n is the frequency in rad/s, and k is the damping ratio (dimensionless). 
Create a user input table with k and n and set their values to 0.7 and 1 respectively. Construct an Excel worksheet to graph the dimensionless function g(t) from 0 – 30 seconds in 1-second increment. Format the x axis to show range 0-30s, major tick marks every 10s, and minor tick marks every 1s.

2. Construct a spreadsheet to calculate the value of the function 


f() = 0.2sin + 0.3cos for  values ranging from 0o to 360o in 1o increments. Plot the function f() versus the angle .

Choose proper chart title and axis titles for your worksheet. Format the -axis with 0 minimum, 360 maximum, major tick every 60 degrees, and minor tick every 10 degrees. 

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