Howard University Washington, D.C. Department of Mechanical Engineering “Strain Hardening “ Lab 2 By Theron Lewis For Professor H.A. Whitworth October 3rd, 2011 Table of Contents ABSTRACT Work hardening (or strain hardening) is the strengthening of a metal by plastic deformation. This phenomenon occurs because of the altering of the material’s crystal structure through dislocation movements. Work hardening is used extensively in metalworking, where one intentionally induces plastic deformation to increase strength and change its shape. These processes are also known as cold working.
1 of 22 Investigation of Deflection of a Cantilever vs. Length of a Cantilever Research Question How does the length of a cantilever affect the deflection of that cantilever when loaded with a constant mass? Introduction The purpose of this lab is to investigate the deflection of a cantilever. In this investigation, I chose to measure the effect of the length of a cantilever on its deflection when loaded with a constant mass because I knew from prior experience that there was some relationship between the two variables. The objective of this investigation is therefore to establish a relationship between the length of a cantilever and its deflection in the aforementioned situation, which may give some insight into the physics of cantilevers.
The formula can be applied to calculate the force generated when you sit on a chair, however thanks to newton’s third law of motion this is also the force that the chair acts upon you and prevents you from falling though you chair. Without specifying the nature or origin of the forces on the two masses, Newton's 3rd law states that if they arise from
Newton’s Second Law Lab Purpose: The purpose of this experiment was to determine the relationships between mass, force and acceleration as well as to prove Newton’s second law Hypothesis: It was hypothesized that there would be an inverse relationship between acceleration and mass; as the value of the mass increased the acceleration decreased. As well it is hypothesized that there would be a direct relationship between the net force and acceleration; as the net force increases the acceleration increases as well. Materials & Method: The materials that were required to do the experiment were a metre stick; its purpose was to measure the amount of string that is going to be used to drag the cart. Next equipment needed for the lab was a dynamic cart; it was going to be dragged by the string with a mass on the other end and will find relationships between these two. Also string (about 75cm) was needed in this experiment which would help pull the cart with the help of the masses that were used.
There are precise definitions of these words in the technical world. In this section we will learning more about strain, strain equation and different types of strain. There are basically two types of stress acting in nature Normal stress: It is a type of stress experienced when elastic restoring force or deforming force acts normal to the surface area. They are of two types - Tensile and compression stress. If there is an increase in the length or
In static equilibrium, a body is not moving. Then the acceleration is zero and from Newton's second law the net force must also be zero. A Force table is a common physics lab equipment that has three or more chains or cables attached to a center ring. The chains or cables apply forces upon the center ring in three different directions. Usually the experimenter adjusts the direction of the three forces, makes measurements of the amount of force in each direction, and determines the vector sum of three forces.
The position of two wings should be relative to each other as if they were very close then the resultant force will be in opposite direction and thus cancel each other. Two wings produce more down force as the lift coefficient increases and the drag decreases. Table 1. Calculated value of Air Resistance Determination of Air Resistance Air resistance is the resistance offered by air to the movement of a vehicle. The air resistance has an influence on the performance, ride and stability of the vehicle and depends upon the size and shape of the body of the vehicle, its speed and the wind velocity.
Fist name, last name Physics ### Lab: Rotational Equilibrium The purpose of this lab was to analyze the physical effects of torques on an object and all the factors that can influence the magnitude of its strength and force. In lecture, we learned that although the magnitude of the force can have a strong effect on the rotational velocity of an object, the location or displacement of that force can have an enormous impact on the force’s effectiveness to do work. In this experiment, we saw, first hand, how a small force can have as much of a dramatic impact on an object as a larger force if the displacement is right. The goal of this experiment was to balance a meter stick at its center of gravity using different weights on opposite ends of the stick. Making the left side our positive direction, and our right, the negative direction was essential in proving algebraically, the results of the experiment.
2.3 Nature of Voltage Sag& Main Root Causes of Voltage Sags Nature of the surges depends on the cause and load where sags is observed as follows Fig. 2.1 Voltage Sag caused by SLG fault Fig.. 2.2 Voltage sag at constant impedance load due to a SLG fault (R.M.S voltage) Fig.. 2.3 Voltage sags at induction motor load due to a SLG fault (R.M.S
Lab 7: “Newton’s Second Law” Newton’s Second Law Purpose: To find the graphical and mathematical relationship between the Net forces applied to an object, its mass and acceleration. Variables: Independent: -Hanging mass Dependent: -Acceleration -Force pulling on cart Materials: * * Dynamic Cart with pegs * Force Sensor * Motion Detector * Computer with Logger Pro * Lab Pro * Ramp with Pulley * Mass Sets * String Procedure: 1. Assemble the Ramp and pulley system as shown. Attach proper length of String to the Force Sensor, and add a loop at the opposite end for attachment of various weights. 2.