THIS IS THE LINK https://ophysics.com/k7.html , PLEASE DO THIS ACTIVITY ON A COMPUTER GO TO THE WEBSITE LINK THAT I PUT THE SAME LINK UNDER MATERIALS PLEASE COPY THE LINK ON YOUR COMPUTER TO DO THE EXCERSICES, THANK YOU.

Objective: In this lab/simulation we will look at the power of simulations to validate calculations and/or the needs to often perform estimates, in these cases a simulation is given some initial conditions. In physics, as well as other sciences and engineering we often develop simulations to solve problems that do not readily have closed form mathematical solutions. This us allows one to simulate the response of designs of instruments and mechanisms to external forces and stimuli such as vibration, shock, thermal changes, movement of objects through various medium (i.e. drag), etc. For example, the drag, a car experiences when travelling at speed due to air resistance, or the resistance a boat experiences moving through water. Other examples might include the resistance of blood flowing through arteries and veins as a diagnostic for medical conditions. One of the key confidence tests for a simulation is to test the simulations results against known solutions. In addition, to using these known conditions to test the validity of a simulator the simulator is often used to validate calculations, especially those involving complex calculations. In this lab/simulation, we will solve several questions, and then input the results of the calculation to validate the calculated solution. We will also explore using a simulation designed for a particular set of conditions and adapting it for other situations by simply adjusting the initial conditions and/or looking at the results at various time steps while interpreting the result between the time steps. Materials: This handout . Attendance of the mini-lecture/lab introduction kinematics in one dimension along with the demonstration of the simulation . Computer and Internet access to use the following simulation: https://ophysics.com/k7.html1) Start the simulation by clicking of the link above or by cutting and pasting the link into your browser. You should get a screen similar to figure 1 below (the annotations in the call out boxes will not be visible. You may also need to increase the size of your browser window to see the entire simulation. oPhysics: Interactive Physics Simulations Motor Drawing Toth Fun Mell Kinematics in One Dimension: Two Object System Run Pause Car Controls for setting initial Position, velocity and Reset accelerations. Zoom In Step through the simulation in 0.1 Zoom Out second intervals Zoom in and out the graph Readout of velocity and position for a given time in the simulation. This is a simulation of two ca's moving in one dimension. You can adjust the hital position, Initial velocity and cooperation of such of the cars. When the run button is pressed, you can watch an animation of the motion of the cars and also see the poll ion vis. time graph for mach of the cars. Use the vidan to adjust the initial position Initial velocity, and acceleration of the red and blue cars. Che the buttons to Run, Pauto, Roost, or Sup the inimation. Figure 1: Opening screen of physics simulation: Kinematic in One Dimension: Two Object SystemIV. Using Simulation to Validate Free Fall Exercises: To this point we have been using the simulation to validate one-dimensional kinematics. What if we want to use a simulation to validate problems involving objects in free fall but we don't have a convenient simulator handy. It turns out we can often use the tools at our disposal if we simply consider the similarity of the problem. An object in free fall is simply a one-dimensional kinematic problem in which the object of interest is subject to a constant acceleration of -9.8m/s = (-g). Therefore, we can continue to use the same simulator we have been using in the previous exercises by simply letting x = y and ensuring we set the acceleration to -9.8m/s'. The kinematics will be exactly the same just in a rotated reference frame for many of the problems addressed.V. Example/Demonstration of Using the Simulation to Validate Free Fall: Ex-Q2: A ball player catches a ball 3.4s after throwing it vertically upward. With what speed did he throw it, and what height did it reach? Ex-Q2A: First thing we need to do is look at which kinematic equations we want to use: For a problem with the starting and ending position at the same point I like to use: Wy = Vay - gt; to solve for the time of flight. Which we can can simply rewrite as: gt = (Vay - v,)- In a free fall condition, the object returns to the point with the same speed but in the opposite direction. Therefore: Vy = -Vay which when substituting into the previous equation give 2voy = gt or Vay (9.am/$7 ) (3.45) 2 2 -= 16.66 m/s = 17 m/s (when rounded to 2 sig. figs.) To calculate the height the ball reaches we'll use: 12 = 15 - 2g(y - yo) At the top of the flight the velocity is zero so we simply set: 2gh = va; where h = (x - xo) Therefore: h = (16.66m/5)2 2g 2.(9.8m/s) = 14.16m = 14m (when rounded to 2 sig. figs.)Ex-$2: Using your results from Q2 verify your answer by running the simulation: Remember since we are using the same simulation we used in the previous exercises for reasons of availability and conveniencewe need to be comfortable with the fact that the coordinate system being used in the simulation is the x- direction. But by setting a = -9.8m/s2. The kinematics are the same even though the coordinate system has been flipped and in the simulation the x-component will represent the conventional y- component used for describing free fall. 1) Since this question only involve the use of 1 object, choose either the red car or blue car to run the simulation. In this example we are choosing the blue car and will set convenient parameter to keep the red car out of the way. Type in the following parameters on the simulation: a) Red Car: i) Red Car: x, (m) = leave this field blank ii) Red Car: V. (m/s) = 0 iii) Red Car: a(m/s?) = 0 b) Blue Car: i) Blue Car: X, (m) = 0 ii) Blue Car: Vo(m/s) = 16.66 iii) Blue Car: a(m/s ) = -9.8 2) Click the reset button on the simulation a then click run. 3) Run the simulation for about 5 seconds and hit pause. 4) Zoom In Out on the simulation to achieve a reasonably viewable graph 5) Using the Step controls step the simulation until the time stamps below the horizontal axis reads 4.3 seconds.Kinematics in One Dimension: Two Object System Run Pause Reset Zoom In Zoom Out Red Car Ing Figure 3: Output of Example Simulation6) Note that the car returns to position zero after 3.4 seconds which validates the solution to the intial velocity. If you run the simulation and step through the simulation to 1.7 seconds you will find the following in the readout for the Blue Car's position, velocity and acceleration. vBlue: xBlue: As can be seen the simulation correctly verifies the calculation giving us confidence in both the calculation and the simulation. Remembering of course that we have flipped the coordinate system and x is representing the y position