![]() ![]() Momentum and energy conservation under these conditions are studied. Attaching Velcro to the pucks makes them stick together in a collision. By comparing the total momentum and the total kinetic energy of two pucks before and after the collision the conservation laws under the elastic case are investigated. Tracing the path of two pucks that collide with each other on the frictionless air table, students measure the momentum of each puck before and after the collision. Conservation of Momentum in CollisionsĬonservation of momentum is investigated in this experiment. centripetal force to verify that the centripetal force increases as v2.Ħ. After repeating this experiment with various springs, they plot angular velocity vs. Then they determine the static force that stretches the spring by an equal length. Student measure the period of rotation required to stretch the spring a given distance. ![]() A horizontal spring attached to the plumb bob provides the centripetal force. The apparatus consists of a rotating gallows from which a plumb bob is suspended. They separately measure the centripetal force, which produces this motion. Students measure the average speed of an object in uniform circular motion. Therefore the dependence of the acceleration on force or mass can be studied. The other one is freely suspended from the string. One mass moves on a frictionless horizontal table. Students measure the acceleration of two masses connected to each other by a string that runs over a pulley. The independence of the two components of the motion is investigated. ![]() From the velocity data, the accelerations in the vertical and horizontal directions are determined. From these data, puck velocities are obtained. Tracing the path of a puck moving on a frictionless inclined plane, students determine the x and y components of its successive positions at constant time intervals. For small masses the paper tape provides a significant drag. By repeating the experiment with different weights, the independence of the acceleration of a falling object from its mass is investigated. From these data, they determine the speed as a function of time, as well as the acceleration (gravity) of the motion. Students measure the successive positions of a freely falling weight attached to a paper tape onto which a timer makes a mark every 25 msec. Errors, which are relevant to the equipment and measurement methods and their propagation, are determined. Students also measure the average background radiation by using Geiger counters to study random errors. volume of the three or four cylinders they measure and finding the slope. They also determine the density from all their data by plotting mass vs. After measuring the masses of the cylinders, they calculate the densities of the metals and compare them to the expected values. They obtain the volumes of various size cylinders from measurements of the cylinders’ lengths and diameters. Students are introduced to basic measurement techniques such as length measurement with a meter stick and vernier caliper, and mass measurement with a digital scale and their associated uncertainties.
0 Comments
Leave a Reply. |