Young's modulus can be defined at any strain, but where Hooke's law is obeyed it is a constant. Hypertonic means that the environment has more solutes compared to the inside of the cell. The design calls for the camera to slide on a pair of rails, with a spring supporting the camera and pulling it up against the tip of an adjustment screw as shown in Figure 1. Notice that in the relationship between T and m is not linear. Even more sickening is the fact that some probation officers even advise these dangerous criminals as to how to get around the law.
Robert Hooke was a 17th century physicist who discovered the relationship between the forces applied to a spring and elasticity. During the experiment, astonishing situations did not arise, or no anomalous features of data found. The results of the experiment confirm the following relationships a. Measure the initial length of the spring using a plastic ruler and record it. The percentage difference of the average value of the force constant and the slope was calculated. For measuring A and T, if you want to use the motion sensor, keep at default sampling rate of 20 and check that displacement is properly zeroed. Simple Pendulum The other example of simple harmonic motion that you will investigate is the.
The constant of proportionality k is called the spring constant. They are oriented in such a way that their smooth sides lining face the light source to enable easy penetration of light through them. However, the spring sometimes was unstable as it moved up and down, especially when the weight was just added, making it hard to check the extension. Between each R 2 is also close to 1, which implies that the trend line is very linear. Where did they come from? You are not supplied with an equation for this relationship. Weigh the 5 loads using an electronic balance and record them. The stretch of the spring can be measured by noting the position of the end of the spring before and during the application of the force.
This will enable us to have larger extensions of the spring. To begin the investigation, the spring was attached to the ring stand. This is known as Hooke's law and commonly written: Though we have not explicitly established the direction of the force here, the negative sign is customarily added. This is much more convenient for building mechanical devices. Hypothesis: The weight of the object is directly proportional to the extension of the spring. The unit of moment is the Newton metre Nm. The tension force of the string is balanced by the component of the gravitational force that is in line with the string i.
Soon after enrolling in Westminster School he became devoted to science, mechanics, geometry and languages. To understand how this works we must understand two terms. You can then calculate the. Therefore, the spring constant k is the slope of the straight line W versus x plot. Solo: Tiga Serangkai Pustaka Mandiri. Download file to see next pages Read More.
Mass grams Displacement cm 50 2 100 4 150 6 200 8 These data have been entered into the table to the left. Because the manufacturers of spring balances expect their product to be used vertically for example, by a fisherman measuring the mass of his fish the scale is calibrated to take into account the mass of the spring and hook. Hypotonic means the environment has less solutes compared to the inside of the cell. The spring then elongated with a certain displacement, and comes back to its normal length every time the mass was removed. A normal way to try to determine a relationship for two variables is to try plotting them in various ways. Safety and Disposal Assuming common-sense lab protocols i. The simple pendulum consists of a mass m, called the pendulum bob, attached to the end of a string.
In other words force is proportional to the extension of stretched material. The motion of a child on a swing can be approximated to be sinusoidal and can therefore be considered as simple harmonic motion. You will determine the period of oscillation of the spring-mass system for different masses and use this to determine the spring constant. If it is a group write-up, you should all be submitting the same document. Therefore, the errors which occurred should be mainly due to parallax.
Through establishment of a standard for the copper nitrate compound and utilizing the knowledge of Beer-Lambert Law, the % mass of the copper in the ore was attained. Data and Results Table 1. But, by far the most interesting, and. The mass is pulled down by a small amount and released to make the spring and mass oscillate in the vertical plane. This is done for the case of the oscillating spring-mass system in the table below and the three functions are shown in Fig. The position of the oscillating object varies sinusoidally with time.
For example, when the displacement is positive maximum, the velocity is zero and the acceleration is negative maximum. The floor beneath your feet works the same way. Analysis You are likely to find a linear relationship between force and displacement. In both examples the direction of the force exerted by the spring is opposite to the direction of the force applied to the spring. Theory and Application of Physics 2. For this experiment, qualitative analysis was employed to establish whether or not a precipitate would form upon adding some acids and bases. If it is a write-up, each person must submit the lab electronically as a word-processed document in Moodle before the next lab meeting.