Torque Kinetic Energy - 5318 Words

WHAT IS TORQUE? Torque is a measure of how much a force acting on an object causes that object to rotate. The object rotates about an axis, which we will call the pivot point, and will label O . We will call the force F . The distance from the pivot point to the point where the force acts is called the moment arm, and is denoted by r . Note that this distance, r , is also a vector, and points from the axis of rotation to the point where the force acts. (Refer to Figure 1 for a pictoral representation of these definitions.) | Figure 1 Definitions | Torque is defined as = r x F = r F sin(). In other words, torque is the cross product between the distance vector (the distance from the pivot point to the point where force†¦show more content†¦Second, you should grab onto the end of the lever, and not a point near its axis of rotation. Third, you should lift in a direction that is perpendicular to the lever: if you pull very hard away from the wall or push very hard toward the wall, the lever won’t rotate at all. Let’s summarize. In order to maximize torque, you need to: 1. Maximize the magnitude of the force, F, that you apply to the lever. 2. Maximize the distance, r, from the axis of rotation of the point on the lever to which you apply the force. 3. Apply the force in a direction perpendicular to the lever. We can apply these three requirements to an equation for torque, : In this equation, is the angle made between the vector for the applied force and the lever. Torque Defined in Terms of Perpendicular Components There’s another way of thinking about torque that may be a bit more intuitive than the definition provided above. Torque is the product of the distance of the applied force from the axis of rotation and the component of the applied force that is perpendicular to the lever arm. Or, alternatively, torque is the product of the applied force and the component of the length of the lever arm that runs perpendicular to the applied force. We can express these relations mathematically as follows: where and are defined below. Torque Defined as a Vector Quantity Torque, like angular velocity and angular acceleration, is a vector quantity. Most precisely, itShow MoreRelated Angular Momentum Essay1430 Words   |  6 Pagesbecause of its mass and motion. Angular momentum is possessed by rotating objects. Understanding torque is the first step to understanding angular momentum.Torque is the angular version of force. The units for torque are in Newton-meters. Torque is observed when a force is exerted on a rigid object pivoted about an axis and. This results in the object rotating around that axis. The torque ? due to a force F about an origin is an inertial frame defined to be ? ? r x F1 where r is the vectorRead MoreScience in a Lacrosse Shot Essay1319 Words   |  6 PagesPhysical Requirements). Shear commenced a 3-D biomechanical study to show the physical fundamentals behind a flawless lacrosse shot. Lacrosse involves a complex rotary motion entailing a kinetic linking from your feet to your arms. Kinetic linking is associated with kinetic energy. Kinetic energy is â€Å"the form of energy contained in an objects motion† (Bloomfield, 31). Each body segment is a â€Å"link in the chain† (i.e. hips, arms, stick, etc.). In preparation for just the right shot, a good player needsRead MoreEssay on Physics of Bowling909 Words   |  4 Pagesfour aspects of bowling that can be explained with physics terms and show you how to use this knowledge to optimize your game. Gravitational Potential Energy Depending on the height from which the bowler drops the bowling ball, the ball will have a certain amount of potential energy. If the bowler bowls with a straight ball, the potential energy of the ball will not affect their game very much. It will, however, draw attention to the bowler when they drop the ball sufficiently high as to broadcastRead More Catapulting though Time Physics Essay2329 Words   |  10 Pagesand other objects that hurl projectiles, also seem as old as human civilization itself. The effectiveness of the catapult in flinging objects over a great distance and causing destruction is due to a few basic physics principals that govern force, energy, motion, speed and mass to name a few. The design of the catapult denotes a change in modern warfare to the engineer behind weapons being just as important as the actual soldiers and people who use them. Projectile-throwing machines are foundRead MoreChanging the Momentum of a Ball766 Words   |  3 Pagesamount of kinetic energy a ball possess after collision. The ball that is travelling down the ramp with a slightly higher angle, will possess more kinetic energy before collision but after collision it will posses less kinetic energy because of it being an elastic collision where energy is conserved and transfers some energy to the ball travelling down the less steep ramp with less momentum. Therefore the ball travelling down the ramp that is not as steep will possess more kinetic energy after collisionRead MoreEssay on The Physics of Bowling1766 Words   |  8 Pages The definition of physics by some may be the science that deals with matter, energy, motion, and force. Therefore everything in the world uses physics in some way or another. One of the numerous things that deal with physics is bowling. Some of the major parts of physics bowling has is the motions, the ways that Newton’s laws apply, the different momentums, and the energy. Other physics topics include torque, pendulum theory and collisions. In the motion of bowling many things are goingRead MoreMass and Kinetic Energy Essay964 Words   |  4 Pagesuniform disk of radius R = 0.25 m has a string wrapped around it, and a m = 3 kg weight is hanging on the string. The system of the weight and disk is released from rest. a) When the 3 kg weight is moving with a speed of 2.2 m/s, what is the kinetic energy of the entire system? KETOT = KEwheel+KEweight = (1/2)(I)(w2)+(1/2)(m*v2) =(0.5* v2)(m+1/2M) =0.5*(2.2^2)*(3+(.5*15)) J b) If the system started from rest, how far has the weight fallen? Read MoreThe Physics of Golf Essay3575 Words   |  15 Pagesgolf club. Two men are most influential in this area of study, Galileo Galilee and Isaac Newton. It is the principles of these two men that will be used during the discussion of the physics of golf. A brief explanation of momentum, moment of inertia, torque, centripetal force, and centrifugal force can be located in Appendix 4. These terms were derived from the experiments and research of first Galileo, and then expanded upon by Newton. Although neither of these two men are solely responsible for allRead MoreEnergy From Track s Vibrations For Safety And Monitoring Using Aurdino Controller Which Will Improve Rail Road Accidents1233 Words   |  5 Pages 1.2 Objectives and Aims The main objective is to recover energy from track’s Vibrations for Safety and Monitoring using Aurdino controller which will Improve Rail-Road Accidents. The proposed harvester is designed to power major areas where there is no proper maintance of electricity. The different equipments usually need a power supply of 10-100 Watts, for example generating warning signals, switches and health monitoring systems. 1.3 Literature Review The first step taken in this projectRead More Physics Of Bowling Essay1188 Words   |  5 Pagesthe net force. When my fingers leave the hole, it’s accelerating. Now, how fast it goes is determined on how fast you swing your arm and let go. Now that’s all Durbin basically said on bowling. But I realized that Newton’s Laws, momentum, kinetic and potential energy all have their role in bowling too. Durbin was correct when he explained acceleration. Let me tell you a little something on acceleration. Acceleration is the rate at which the velocity is changing. Because acceleration is a rate, it