Objective to find the centripetal force and centripetal acceleration by experimenting with horizontal circular motion with different masses. Experimentally verify the forces involved in uniform circular motion lab report 3. Studying this topic illustrates most concepts associated with rotational motion and leads to the study of many new topics we group under the name rotation. There are many examples of uniform circular motion. Students concept understanding of uniform circular motion is not optimal because the teaching learning is not. The pdf version of the teacher toolkit on the topic of circular motion is displayed below. Phy 3 lab 5 centripetal motion stony brook physics. So, the planets move on approximately circular orbits around the sun. Pdf uniform circular motion concept attainment through circle. S4p120 discuss the centrifugal effects with respect to newtons laws. You should be able to verify the relationship between velocity, radius, acceleration, mass, and force for an object moving in a circle at constant speed. Examples are a ball on the end of a string revolved around ones head. Uniform circular motion, motion of a particle moving at a constant speed on a circle.
Lab 5 uniform circular motion introduction if you have ever been on an amusement park ride that travels in a curved or circular path, then you have experienced a force, called a centripetal force, pushing you into the ride. A whirligig is a toy that has two masses attached to each other by a string. By newtons second law, the force that produces uniform circular motion, or the centripetal force is given by r v f net, where m is the mass being rotated, v is its tangential velocity, and r is the radius of the circular motion. To discover and quantify the factors that determine the force required to keep an object in uniform circular motion. Following are the examples of uniform circular motion. Chapter 5 uniformcircularmotion and centripetal force. Uniform circular motion is an important concept and has many applications in life. Lab iv 1 laboratory iv circular motion the problems in this laboratory will help you investigate objects moving in uniform circular motion.
Tippens, professor of physics southern polytechnic state university. An object moving in a circle with constant tangential speed is said to be executing uniform circular motion. Review the key concepts, equations, and skills for uniform circular motion, including centripetal acceleration and the difference between linear and angular velocity. If motion in circle at const speed, force towards center.
Uniform circular motion a powerpoint presentation by paul e. This motion is called uniform circular motionmotion in a circular path at constant speed. Speed of circular motion dulku physics 20 unit 3 circular motion, work and energy topic b ex. Open the simulation page uniform circular motion interactive. In this investigation you will have an opportunity to learn more about the nature of uniform circular motion by attempting to explain how a whirligig works. The problems in this laboratory will help you investigate objects moving in uniform circular motion. Circular motion and centrifugal force experiment mit blossoms.
Uniform circular motion lab uniform circular motion lab. Write a description for the metal mass motion after releasing it from uniform circular motion. Can calculate this force in terms of v and r r v t v v. In this experiment you will determine what variables must be known to.
Uniform circular motion is the motion of an object traveling at a constant uniform speed in a circular path. Uniform circular motion and centripetal acceleration. Uniform circular motion mit opencourseware free online. And if there is acceleration, there is a net force newtons first law. Use the force from equation 4 and the acceleration from equation 3. Douglas giancoli purpose this lab will allow us to examine the relationship between mass, velocity, radius, and centripetal force. Relationship between the centripetal acceleration and the. Angular motion variables opens a modal distance or arc length from angular displacement opens a modal. The physics classroom grants teachers and other users the right to print this pdf document and to download this pdf document for private use. Introduction the inward force which causes an object to revolve in a circle with constant speed is called the centripetal force. A cycle can be defined as one complete motion around the circle. Make sure you use the majority of the sheet of graph paper so that spread of. Circular motion s4p119 explain qualitatively why an object moving at constant speed in a circle is accelerating toward the centre of the circle.
Uniform circular motion lab introduction uniform circular motion is defined as the motion of an object travelling at a constant uniform speed on a circular path. As it stands, mass and radius are easy to measure, but the tangential velocity is not. Circular motion is motion in two dimensions characterized by a circular path. To investigate the behavior of friction in circular motion. Pure rotational motion occurs when points in an object move in circular paths centered on one. Students should already have solved many problems involving circular motion. This worksheet contains 20 detailed uniform circular motion problems with a step by step answer key. These problems are great examples for your general physics or physical science classes. Because velocity is a vector quantity, with both speed and direction, when an object moves with uniform speed in a circular path, its velocity therefore undergoes constant change, meaning it experiences acceleration. The gravitational force from the earth makes the satellites stay in the circular orbit around the. Uniform circular motion the pdf file below accompanies the uniform circular motion interactive. A car moving on a curve at 50 miles per hour, a child on a merrygoround at an amusement park, and the moon orbiting the earth are examples of nearly uniform. Uniform circular motion is motion along a circular path in which there is no change in speed, only a change in direction. They are the radius of the motion r, the angular speed.
In a uniform circular motion, the object experiences a centripetal acceleration and hence a centripetal force. Uniform circular motion united states naval academy. In the figure, the velocity vector v of the particle is constant in magnitude, but it changes in direction by an amount. The end circular motion lab dataresults all work is the same but has different values in period, mass, velocity, and radius. Assessment of learning outcomes includes experiment worksheets and posttest of students. Other examples are the rotating armature of an electric motor or the crankshaft of a gasoline engine. For an object of mass m, moving in a circle of fixed radius r and with a constant speed v, the centripetal force is the mass times the centripetal acceleration. This chapter deals with the simplest form of curved motion, uniform circular motion, motion in a circular path at constant speed. Note that although the objects velocity is constant in magnitude, it is not constant in direction, and thus the object is accelerating even though its speed is constant. Besides the speed, there are several other variables that are used to characterize the motion. Skill summary legend opens a modal uniform circular motion introduction. Jamer 1 introduction uniform circular motion occurs when an object goes around in a circle at constant speed. Demonstrate for students how to start the toy airplane flying in circular motion.
It is the force that keeps an object in a circular motion. Without it, earth would move in a straight line and satellites would fall out of. Motion of artificial satellites around the earth is an example of uniform circular motion. There are several terms that can be applied to the study of uniform circular motion. If a body is involved in rectilinear motion and the motion is consistent, then the acceleration of the body must. Phy 111l activity 2 university of southern mississippi. To use graphical analysis techniques to deriveverify the equation for centripetal force. They should be able to draw a freebody diagram and identify the radius of an objects motion. A car travels in a circular path of radius 30 m, and takes 60 s to make a complete circle. We can consequently analyze uniform circular motion using newtons laws. In this lab we will study the relationship between acceleration of an object moving with uniform circular motion and the force required to produce that acceleration. Introduce centripetal and centrifugal forces, as well as uniform circular motion 2. While it might be more fun to carry out this study on a midway ride.
These problems address horizontal, vertical, banked, and incorporate friction into uniform circular motion. Tangential velocity if motion is uniform and object takes time t to execute motion, then it has tangential velocity of magnitude v given by v s t f 1 t period of motion t time to complete one revolution units. When an object moves in a circular path, there exists a force called the centripetal force, directed toward the center of the circle, that acts to keep the object moving in a circle. Uniform circular motion definition, laws, formula and. This lab illustrates the concept of uniform circular motion, which is different from uniform linear motion because the direction is constantly changing, even though. Circular motion abstract centripetal acceleration is the force that we feel when an object is undergoing an uniform circular motion such as when going around a curve, or on a loop to loop roller coaster.
A particle moving at constant speed v in a circular path of radius r. This is the same motion that describes satellites in orbit around the earth, or objects whirled around on a rope. That is, an object can be considered as consisting of many small point masses with constant distances between them no deformation. Since the particle is under uniform circular motion, the angle. However, the document should not be uploaded to other servers for distribution to andor display by others. Uniform circular motion occurs when the object has constant speed and constant radius and centripetal acceleration occurs when there is instantaneous acceleration directed towards the centre of the circle.
Lab report 3 for uniform circular motion with wrong data but good outline. Circular motion plays an important role in nature and technology. This type of motion is defined as the motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time. Uniform circular motion the concept of uniform circular motion means that the speed of the object moving in the circle is constant.