viii . Add a column in excel , in which you generate heights for the times from your simulation that you recorded earlier . ix . Describe how well do the values generated by your equation match the values generated by the simulation ? How closely does the trendline from the graph of the simulation data match your equation ? You do not have to quantify the exactness of the match , since the simulation should match your calculation very closely . If you do not have a close match check your work. x. Label the axis of your plot with units and denote time vs height . Give your chart a title xi. Discuss whether the results of simulation would change if a different object was chosen (assuming air resistance remains turned off ). Exercise Set the cannon to a height of 1-7m . Set the initial speed to a value >10m /s. Point the cannon directly up, i.e. at +90 degrees . Select the "slow " option . Launch . Make sure to record your choice of initial height and initial speed . i. State whether the direction of the velocity changes or stays the same throughout the motion. What about the direction of the acceleration? Describe how the direction of the velocity and the acceleration compare throughout the motion (are they same, different, sometimes same , sometimes different ?) ii. Take a screen shot of the trajectory ii. Find the highest point and record its time and height . iv. Find the lowest point and record its time and height . V . Based on your knowledge motion at constant acceleration , write down the equation for position as a function of time , with your chosen initial position , your chosen initial velocity , and Earth's gravitational acceleration. (Be careful with +signs.)