Help with this Lab please

The purpose of this pre-lab is to continue thinking about Force, specically in the context of motion where a force imbalance creates an acceleration that can be measured by an object's increasing speed. There is only one activity to this lab, and that is to create a scientic question and perform 2-3 trials where you set up your experiment and analysis in such a way to provide evidence for an answer to your scientic question. In this lab, your scientic question MUST be, in some way connected to FORCE, either the net force on an object or a component force (like tension) on an object. Aspects of your question can connect to other physical parameters like position, velocity, or acceleration, as long as your nal results report back on an understanding about net andfor component forces (like tension) in your system. In this lab, you will use the cart on the air-track setup to take BOTH movie and accelerometer measurements of your cart as it accelerates due to an external force in a pulley system. See Figure 1 below for a schematic of the setup. It is very similar to some of your Mastering Physics Homework Problems: two masses, connected by a pulley. A Air cart thnd Figure 1: Schematic diagram of the initial air cart and pulley setup. with the red arrow showing the force that a human hand is exerting on the air cart to hold it still at the start of the trial. There must be an external force on the air cart to hold it still, when the air track is on and there is negligible friction. Pre-Lab Slide 1: Free-Body Diagram of Experimental Setup at Rest {no friction). a. Draw the free body force diagram of the dangling mass (m), when you are holding the system at rest. Be sure to label your coordinate system, to set up Fmat = ma in the next step. b. Draw the free body force diagram of the air cart (m), in this same conguration where you are holding the system at rest. Again label coordinate axes. 0. Write out on paper (and take a picture), or type out (if it is easier), the three equations of Newton's Second Law (ma = Fnet = all the component forces summed with proper signs for directions). Be clear about which equation corresponds to which object, and which direction. You need one equation for each dimension of each object. Setup: Cart on frictionless air track, holding cart still and letting it go to accelerate from external force from Tension in a Pulley System. Pre-Lab Slide 2: Free-Body Diagram of Experimental Setup in Acceleration (no friction). a. As a continuation from slide 1b, draw the free body force diagram of the air cart (m,), after you have released your hand's force on the car and it is allowed to accelerate. Keep your coordinate axes for m, the same orientation as in slide 1. Draw the free body force diagram of the dangling mass (m2), after you have released your hand's force on the cart, and it is accelerating. Again keep your coordinate axes for m2 the same as you did in slide 1. . Write out on paper (and take a picture), or type out (if it's easier), the equations resulting from applying Newton's Second Law (ma = Fret = all the component forces summed with proper signs for directions). Be clear about which equation corresponds to which object, and which direction. You need one equation for each dimension of each object Pre-Lab Slide 3: Designing an Experiment to compare Tension at rest vs. in acceleration: a. Solve for the tension in the string when you are holding the cart and the system is at rest. (hint: focus on my free body diagram here). You can leave your answer in terms of my and g. b. Consider the tension in the string when you let go and the cart system is accelerating. Is the tension the same, greater than in part 3a, or less than in part 3a? Justify your reasoning. c. Describe how you can create a PASCO movie and accelerometer recording that captures information about the cart tension while you hold the cart still AND THEN release it to see the tension during acceleration (hint: the PASCO accelerometer is bolted to the top of the cart and the string over the pulley is attached to a tension sensor coming out of the accelerometer, see Figure 2 below). ......... Figure 2: Image of the 3D PASCO accelerometer, with hook that serves as the 1D PASCO force sensor.. Note the x-y-z axes on the front. The force sensor is oriented along the -x direction. This sensor is bolted to the top PAster. wireless force acceleration (KPW) NOSE of the air cart, with the string attached to the hook so that the PASCO force sensor can continuously measure Tension in the string. In AL Lab 5, you will make simultaneous C measurements of PASCO x direction acceleration, PASCO force, and your PASCO movie recording. 2Pre-Lab Slide 4: Making a Prediction about the acceleration of the system. Create a prediction about how you think the acceleration of the cart (m, ) depends on how much mass is hanging over the side of the pulley (m2). You have an option to take several runs, where you can change m, and/or m2 to observe how acceleration of the cart changes based on mass. a. As you add more mass to m2 (and keep m, the same), do you expect the acceleration of the system to decrease, increase, or stay the same? b. As you add more mass to m, (and keep my constant), do you expect the acceleration of the system to decrease, increase or stay the same? c. You will be responsible, in the lab, for determining your theoretical predictions for the acceleration of your system, by measuring all the component masses. Pre-Lab Slide 5; Alternate Experimental Setup with Friction You will have an opportunity to make measurements of cart acceleration and tension in the system with friction, by leaving the air track off. a. Draw an updated free body diagram that labels where the friction force is, when the air track is turned off. Z b. If the cart is at rest with the air track off, without you holding it, and a certain amount m2 hanging over the pulley, describe how you could find the coefficient of static friction of the air track. LIGHT c. Describe how you could find the coefficient of kinetic friction through several trials of loading increasing mass onto m2, hanging over the edge of the pulley. CL A