Angular Acceleration in a Rotational Motion Lab Report

Angular Acceleration in a Rotational Motion Summary sheet Objective The experiment aims at determining terminal angular velo and angular acceleration in a rotational motion. It also aims at determining involved moment of inertia in the experiment and compares the experimental value with the theoretically computed value. Method The experiment used a wheel, a rope, and a suspended mass. The wheel was fixed at a height and the mass suspended on the rope that was attached to the freely rotational wheel. The radius of the wheel was measured and recorded. The height between the affixed mass and the floor, representing the distance to be travelled by the mass, was then measured and recorded. The mass, 20 grams, was then released to fall over the height. Time taken by the mass over the distance was measured and the experiment repeated three times. The experiment was repeated for different masses, 50 g, 70 g, and 100 g, and the time taken for each mass to travel over the distance noted. Results The research results and subsequently derived values are shown bellow. mass 20 g 50 g 70 g 100 g distance 0.9 m 0.9 m 0.9 m 0.9 m time tken by the falling mass first trial 4.135 2.79 2.03 1.89 second trial 4.25 2.58 2.37 1.8 third trial 4.085 2.62 2.1 1.99 average time 4.15 2.66 2.16 1.89 average velocity 0.216 0.34 0.417 0.479 final velocity 0.436 0.68 0.8358 0.956 acceleration 0.105 0.255 0.3857 0.507 angular acceleration 1.039 2.522 3.815 4.99 tension in the tape 0.149 0.478 0.659 0.931 torque acting on the wheel axle 0.02 0.0483 0.0667 0.0941 total mass of the wheel (M) 3.799kg circumference of the wheel 0.655 m radius of the wheel 0.1011m frictional torque from the graph 0 calculated inertia 0.0194 measured inertia 0.191 moment of inertia, percentage difference 1.53 % Applications One of the practical applications of rotational motion and its associated inertia is the balancing of weight on bicycles. While a bicycle is stationary, it is very difficult to balance its weight and other weights that may be placed on it. The rotational force of the wheels that results in the vessels motion however induces inertial that makes balancing easier and prevents the bicycle from falling. The concept of rotational inertia is also applicable in explaining relatively larger forces in operating objects with circular shapes. An example is an umbrella whose opening and closing requires larger forces that even the mass of the objects. The extra force is determined by the distribution of particles in the umbrella and not mass only. Consequently, an umbrella has a larger inertia, relative to its mass, because of rotational properties that are characteristics of its particles’ distribution (Goswami, p. 105). Calculations Average and final velocities are computed from the formula, Velocity = distance/ time. For the 20 g mass, Average velocity= 0.9/4.15 = 0.216 m/s (trancated) The other velocities are similarly calculated from corresponding distances and times. Acceleration =change in velocity/ time. Therefore acceleration for the 20 g mass= 0.436/4.15 =0.0105. The other accelerations are similarly calculated. Percentage error = {(calculated inertia- measured inertia)/calculated inertia}*100 ={(0.0.0194-0.0191)/0.0194}*100 =(0.0003/0.0194)*100 =1.54 % Works cited Goswami, Amit. The physicists’ view of nature. New York, NY: Springer

Family in Europe History Coursework Example | Topics and Well Written Essays - 1250 words

Family in Europe History - Coursework Example legends as women seemed to have enjoyed a certain degree of freedom in deciding their own futures, in owning property and in bringing honor and wealth to the family through marriage and children. This gave her stronger power within her own household as well, including the power to divorce if she so desired. Part of the woman’s value probably stemmed from the great amount of sexual promiscuity that took place during these times. Although it could never be entirely certain that the children of a son were direct blood descendents of a particular line, it was a certainty that children born of a daughter were. The confusion caused by this acceptance of sexual infidelity made for tense households as the children and mothers tended to fight against each other for inheritance rights. To protect the children from their half-siblings and other lovers of their parents, it became common practice to send the children away to be raised by foster parents. It is also probable that lower class es, lived entirely different lives. Women in the lower classes could be sold into slavery, either for sexual favors or for household services, while men in the lower classes were most often pressed into service for wealthier men as shepherds, farmers or in other vocations. However, it also seems clear that education, including literacy, was practiced in most homes and was made available to girls as well as boys. The Germanic Sippe was a form of kinship group that seems to have been very similar to the Irish sept. While the Irish sept was clearly a blending of patrilineal and matrilineal lines, it is more difficult to trace these relations within the Germanic texts. However, there is evidence that the Sippe followed at least the bloodlines of the male. Also unlike the Irish, there seems to have been a closer connection between the Sippe and the land that they settled on. Although family groups seem to have settled the land, they are also like the Irish sept in that they probably

Computer System Infomation Essay Example | Topics and Well Written Essays - 500 words

Computer System Infomation - Essay Example It is constantly upgrading its search engine. Apart from this it has constantly tried to add value to its Google search users like Google alerts, Google news. Till now Google's main raw material has been in the domain of free content, whereas the new business it is entering requires partnerships and networking for content. For doing the new business the organization will require new skills in customer service, negotiations and networking. Meeting customers' expectations and partners needs will become very important. As an organization it has been leveraging its technical skills to drive the company. As of now, as an organization, it has not been able to adequately respond to problems related to customer satisfaction. Many of its customers have suffered using their AdWords product. Some of its products have created conflict with its partners in copyrights and other Intellectual property related aspects, which have not been adequately resolved. This is an area which Google does not seem to have identified as a problem area and looked for solutions. Google has attracted a large pool of talent in the IT sector to develop innovative products for its growth. Now it needs to translate organizational needs to be met through human resources.