These materials may not be reproduced without permission of NCSSM.A ∥ = Σ F ∥ m (use Newton’s second law for the parallel direction) a ∥ = m g sin θ − F k m (plug in the parallel forces) a ∥ = m g sin θ − μ k F N m (plug in the formula for the force of kinetic friction) a ∥ = m g sin θ − μ k ( m g cos θ ) m (plug in m g cos θ for the normal force F N ) a ∥ = m g sin θ − μ k ( m g cos θ ) m (cancel the mass that’s in the numerator and denominator) a ∥ = g sin θ − μ k ( g cos θ ) (savor the awe when you realize the acceleration doesn’t depend on mass) a ∥ = ( 9.8 m s 2 ) sin 3 0 ∘ − ( 0.150 ) ( 9.8 m s 2 ) cos 3 0 ∘ (plug in numerical values) a ∥ = 3.63 m s 2 (calculate and celebrate) \begin 0 0 0 0 sin θ cos θ sin θ tan θ θ θ θ = m g sin θ − μ s F N (plug in formula for maximum static friction force ) = m g sin θ − μ s ( m g cos θ ) (plug in expression for normal force on an incline ) = m g sin θ − μ s ( m g cos θ ) (divide both sides by m g ) = sin θ − μ s ( cos θ ) (savor the awe when you realize the angle doesn’t depend on the car’s mass) = μ s ( cos θ ) (solve for sin θ ) = μ s (divide both sides by cos θ ) = μ s (replace cos θ sin θ with tan θ ) = tan − 1 ( μ s ) (take inverse tangent of both sides) = tan − 1 ( 0. © North Carolina School of Science and Mathematics, All Rights Reserved. Click Done and vertical error bars will automatically be added. With an incline that is frictionless and you have a block on it the blocks weight is directed strait down but the normal force is perpendicular to the incline so when you add the force vectors you end up with a net force parallel to the incline pointing down and this is what. Make sure Error Bar Calculations, Percentage, and Use Column are selected. So the force is broken up into a Normal Force and a Friction Force. In the Manual Column Options dialogue box, click on the Options tab. Next, double-click on the column heading for the dependent variable. To turn on this function, click Tangent, a. Enter the values of the % Mean Deviation in the column. Logger Pro can display the tangent line to a curve, as well as display the slope numerically. Select Data ->New Manual Column from the menu. Name the graph appropriately and then Auto Arrange the page.Īdding error bars using values of the % Mean Deviation of the dependent variable Now click Insert, Graph and select the residuals for the dependent variable. When you click Done, the values of the residuals will automatically be calculated. Name it Residuals of _ and enter the units. Now create another calculated column for the residuals. When you click Done, the fit values will automatically be calculated. For the equation, enter the equation of the fit using the dependent variable and the values of the fit coefficients. Name the column appropriately and enter the units. If your equation involves pi, you can select that as a Parameter.įirst create a New Calculated Column for the values of the dependent variable calculated from the fit. Figure 1 illustrates the situation with a free body diagram for the block. Then select the Functions and the Variables for the equation. Find The magnitude and direction of the net force on the block in terms of m, g and The magnitude and direction of the block’s acceleration in terms of g and Solution: The forces acting on the block are gravity, FG, and the normal force, FN. motion lab moving plane incline physics horizontal uniform level down. In the Equation window, enter the Name (long and short) of the new variable and the units. Please note: The Car and Ramp Lab requires the Physics Workshop Stand and Timer. Select Data ->New Calculated Column from the menu. You can click the button to stop collecting data or you can just wait until the default collection time expires. The default values are 7 and 7.Ĭlick this button above the graph window. To reach the dialogue window to make changes, click File -> Settings for Untitled (or whatever the file name is). The fitting and smoothing algorithms use two parameters called Number of Points for Smoothing Calculation and Number of Points for Derivative Calculation. Method 2: Another method is to drag the mouse over the region of the graph that you want to enlarge.Then enter the Top and Bottom and values that you want. Method 1: Double-click on the graph of interest and select the Axes Options tab.When you change the collection time, the Time axis of all the graphs will automatically rescale unless you've set those graphs for manual scaling (see the next item).īy default, the vertical axes will autoscale. Change the collection time in the Length window. This automatically arranges all the windows so that there's no overlap.Ĭhanging the length of time that data is collectedĬlick Experiment -> Data Collection. ![]() ![]() You can check for this by clicking on the icon located in the upper left-hand corner of the Logger Pro window.Ĭlick Insert -> Graph in the upper menu bar.Ĭlick Page -> Auto Arrange. The program should automatically detect the interface and the motion detector. Video analysis operationsĭisplays video analyis tool menu to right of video ![]() Here are some software operations in Logger Pro that you'll be using.
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