Megan Lankford 10/11/12 Physics Lab: The Ballistics Pendulum and Projectile Motion Introduction/Objective In this lab, our focus was to identify the initial velocity of a metal ball by firing it as a projectile and compare it with the velocity. Also, we had to determine the initial velocity of the ball fired into the ballistics pendulum and its relativity to the initial velocity in which the ball plus pendulum moves after firing. This lab demonstrates the principle of conservation of momentum and projectile motion and how they are relative to each other. Procedure 1 To being our experiment, we had to weigh the metal ball and pendulum to give us our mass and help us determine the before and after effects of the collision. After we had taken all of our measurements we had to decide which setting we were going to fire the ball at.
Next, using the equations the total distance the ball would travel was found. After that, the students called over Mr. Neenan so that he could observe the firing of the projectile launcher. The projectile launcher was at the end of the table and the calculated distance was marked off on the floor by a target. The projectile launcher was then set up perfectly horizontal and fired. Part Two: This part of the lab was to hit Mr. Bill with the projectile as he was sitting on the floor.
Procedure The group first took measurements such as the mass of the object, the radius of the rotation, the tension of the mass when we attached it to the apparatus. The mass (m) of the object was weighed in at .446 kg. We found the radius of the rotation by measuring the distance between the pointer and the holder. We also had to add in the radius of both poles to find the true radius of the rotation. We used a vernier caliper to obtain the diameter of those two and therefore, the radius.
19/04/12 Physics Lab Report : determination of Terminal Velocity Maksym Panas This lab investigates the velocity of a ball bearing falling through glycerin. A small metal ball bearing was released into tube,140 cm long, containing glycerin. When released , the bearing accelerated to terminal velocity and than maintained the speed until the bottom of the tube. I decided to find the clearings terminal velocity by comparing the distance taken for t to travel through the glycerin and the time taken to do so. Research Question : What is the terminal velocity of a ball bearing in glycerin?
Purpose: When light travels through different mediums, it is being refracted. The purpose of this lab is to test Snell’s law of refraction. Hypothesis: The angles of refraction that I predicted from the angle of incidences by using Snell’s Law are below on the predicted angle Column. To obtain these values I used the index of refraction of crown glass because it is more likely close to the glass (plexiglass) that we are using. Angle of Incidence 0° 10° 20° 30° 40° 50° 60° Predicted angle of refraction 0 6.56° 13.0° 19.2° 25.02° 30.27° 34.74° Variables and Controls: Independent Variable: The angle of the light coming from the ray box or the angle of incidence Dependent Variable: The angle of refraction on the plexiglass.
Lab 8: Ballistic Pendulum Objective: In this lab we used three methods to measure the initial velocity of a projectile from a spring gun. In the first experiment we used kinematics alone to determine the mean initial velocity for the projectile. In the second experiment we added a simple ballistic pendulum to derive the velocity of the projectile using the principles of conservation of momentum and energy. In the third experiment we used a physical pendulum, the equations for conservation of angular momentum and energy, and the equation for the period to determine the initial velocity of the projectile. Description: In these series of experiments the apparatus we used was a spring gun that for the first experiment shot a steel ball freely which eventually struck the floor.
Making the left side our positive direction, and our right, the negative direction was essential in proving algebraically, the results of the experiment. When we say, “balance,” we mean to say we will try to set the net torque equal to zero, Σ Ʈ=0, we want all the forces on opposite sides to cancel out, giving us an even leveled meter stick. In our experiment, we had two different parts, each containing three slightly different trials. In the first half of the experiment, we hung the meter stick on the 50.0 cm mark and placed different weights on different ends. We moved around the weights until we ended up with what we saw to be an even leveled meter.
Objective The purpose of this experiment is to prove the laws of reflection and refraction, and to determine the angle of the total internal reflection and the index of refraction in the experiment. Theory The theory being experimented in this procedure is that of Willebrord Snell. From his theory we understand that the incident ray, the normal line and the refracted ray all lie on the same plane. We also understand that the relationship is defined in a ratio with the following equation; Which means that the ratio of the sine of the angle of incidence to the sine of the angle of refraction, I equal to the ratio of the speed of light in the original medium and the speed of light in the refracting medium. Procedure We set up the optics track, light source and the ray table.
In the first trial , we shot the circular metal ball out of the gun at an angle parallel to the ground(0).The gun , itself , had three levels of compression . The third compression was the strongest and thus , shot the ball farthest , and the first compression performed the weakest force. First , the value of time was calculated using the formula: t √2yo/g.Yo was set equal to 1, illustrating that the gun was positioned 1m from the ground, and g was equal to 9.8 (gravity constant). With this information, our time was found to be .45175 seconds. Now , using the plastic rod , we positioned the gun to its third compression and shot the ball a total of 3 times .Using a meter stick , we measured the
Projectile Motion Internal Assessment BY: Abel Giday Date: November 19, 2010 Design: Marble Direction of Marble Two Meter Sticks on Inclined Plain (to help direct marble) Photo Gate White Paper Inclined Plain Carbon Paper Table Table Hanging Weight Meter Stick Weighing Scale Plastic Bag and Stand (To capture Marble) Caliper The above diagram represents a method that can be used in order to investigate, Projectile motion. As the marble is released from a specific height on the inclined plane, two parallel meter sticks help guide the marble directly down the ramp. As the marble is rolling down the ramp with a certain velocity, it crosses through the Photo Gate which allows one to obtain an accurate reading of the marbles instantaneous velocity. The marble then drops of the table and falls to the ground due to the influence of gravity. As it hits the ground it lands on carbon paper that has been placed over another blank piece of A4 paper.