Download Notes on Rotational Dynamics - General Physics Laboratory I | PHYS 1101 and more Study notes Physics in PDF only on Docsity! PHYS 1101 Rotational Dynamics Exp 6 STEP 11 11. In this last part, you will use the computer to acquire the data used to calculate the acceleration. Open activity Rotational Dynamics. Release the disk, click Start, and after five seconds click Stop. The Data window should indicate that Run #1 is available for processing. Use the angular position data to create a data set for displacement, x. Click on the Calculate button at the top of the screen. In the Calculator window click on New, type “x = deg*(400/360)” under Definition. Click Accept. You should now be asked to define the variable deg. To define deg simply click where it says Angular Position (in the Data window) drag and drop it where it says “Please define variable deg” under Variables. If you see a rectangle enclosing the phrase “Please define variable deg” when the data is dragged, it is ok to drop the data. To set the units of x click Properties in the Calculator window then type “mm” under Units, and under Variable Name erase Y and type “x”. Click OK. We now need to find the instantaneous velocity as a function of time. In the Calculator window, click on New and under definition type “dx = x-last(1,x)” and click Accept. If you are asked to define the variable x drag it to where it says “Please import the variable x” under Variables. To set the units of dx click Properties in the Calculator window then type “mm” under Units, and under Variable Name erase Y and type “dx”. Click OK. Similarly, we are going to create the variable dt. Click on New in the Calculator window. Type “dt = t-last(1,t)” under definition and click Accept. If asked to define the t, click on “t = timeof(x)” in the Data window and drag it to define the variable. To set the units of dt click Properties in the Calculator window. Click on the drop down button besides Variable Name and select Y, erase it and type “dt”, then type “s” under Units. Click OK. Create the variable v by clicking New in the Calculate window and typing “v =dx/dt” under Definition. To set the units of v click Properties in the Calculator window, click the button besides Variable Name and select Y, erase it and type “v” then type “mm/s” under Units. Then click the button again, this time select X, erase it type “time”. Then type “s” under Units. Click OK.
