Phys4AS17 jsong

Purpose: Prove that the impulse which can be calculated by the area of the force verse time plot equals to the change of momentum. Verify the impulse-momentum theorem. Introduction: In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. This integration equals to the change in momentum. So if we measure the area under the curve of force verse time, we can derive the integral. Compare it to the product of the cart weight and the change of the velocity. We can verify the impulse-momentum theorem by this way.   EXPM1: Set the track up. Then clamp the cart to a rod clamped to the lab table. Extend the spring plunger on the dynamic cart. Mount a force sensor to another cart, with a rubber stopper replacing the hook mounted on the protruding part of the force sensor. Collect data with logger pro and display the force verse time plot. As we can find from t...

Lab Partners: Lynel Ornedo, Nina Song, and Joel Cook Purpose: Determine an equation for the magnetic potential energy with a magnet in conjunction with a slider on an air track. Setup: In this experiment we use an air track attached to a reverse vacuum which will create an air flow and make the metal slider on the track able to travel without friction. This equipment will reduce error. A strong magnet is attached to the slider and another strong magnet will be attached to the end of the track. Procedure: When we move the metal slider to the end, the slider will bounce back due to the magnetic force. So if we level the air track at different angle we can get a table which includes angle, force and radian. As we all known, the integration for a force equals to energy. In this lab, the integration of F  is the magnetic potential energy. To verify this equation, we need to use a motion sensor. Attach this motion sensor to the end of the magnetic ...

Purpose: Measure the work done by a non-constant spring which stretches a cart by a measured distance with force sensor, motion detector and Lab Pro. Graph the data collected during stretching and determine the relationship between work done and the kinetic energy, which are equal to each other in theory. The proportion of the force area is exactly the point of kinetic energy at the same time point. EXPT1: work done by a constant force First set up the track, cart , motion detector , force probe and other equipment like the picture shown. Plug force sensor and motion detector and zero them. Adjust the force sensor with a 500-g mass hanging on the string over the pulley. Then remove the mass and add it to the cart. Enter its value as the mass in the data-user parameters menu. Level the track so that the car rolls at a constant speed after a push. Hang 50 grams from the end of the string and then pull the cart back. Hit collect and release the cart. Then we will g...

Purpose: Determine the output power of human beings to understand the calculation for work and power. Introduction: Power is the rate at which work is done. To calculate the average power, we need to get the work and the time. First of all, we should lift a known mass up by a measured distance. By getting timed, we can derive the power. Then walk up the floor and get timed. We can derive the second power by using those data. Run up the floor and get timed to derive the third power. Calculation: As plotted. Conclusion: a)     in your analysis we neglected KE in calculating the total work you did. Make a reasonable estimate of how big of an error this introduces into results. b)    A microwave on oven typically has a power consumption of appoximarly 1100W. How many of the flights of stair we used in this lab would you have to climb each second to equal the power output?          P=111.78w n=1100/...

Purpose In this lab, we need to determine the relationship between centripetal force, distance, mass, and angular velocity. Introduction Centripetal force is a force that acts on a body moving in a circular path and is directed toward the center around which the body is moving. The equation of it is procedure To know how long it takes for the disk to make some number of rotations at a range of rotational speeds. We did this by using a piece of tape on the rim of the disk, passing through a photogate, to determine the rotational period of the disk. And then measure the distance of the mass from the center of the rotating disk. Data Analysis Conclusion  When the radius between moving point to the center getting larger, it also requires more centripetal force. If we get more angular velocity to an object, the object need more centripetal force to rotate.