Follow your instructors directions to calibrate the strip timers. Douglas giancoli purpose this lab will allow us to examine the relationship between mass, velocity, radius, and centripetal force. Lab notes since creating true uniform circular motion in a lab setting can be difficult, in this lab you will use the string and a cylindrical mass bob to create a pendulum that hangs from the force sensor. We will be using the vernier logger pro software for the video analysis. Uniform circular motion the concept of uniform circular motion means that the speed of the object moving in the circle is constant. Thus, the setup will not be true uniform circular motion as the pendulum is affected by the acceleration due to gravity. In addition, take the following safety precautions. If you show the vectors, you will see the balls velocity vector, in blue, and its acceleration vector, in green.
Another major category of forces that produce uniform circular motion is gravitation. Velocity a vector quantity whose magnitude is a bodys speed and whose direction is the bodys direction of motion i. Lets start by learning some common terms or definitions, if you will. Examples are a ball on the end of a string revolved around ones head.
Under the edit menu, choose copy to store the data temporarily in the windows clipboard. The tension in the string applies the centripetal force to the ball, causing it to move in a circular path. Samsung gtn700 is equipped k3dh acceleration sensor and acquisition software. 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. This means that circular motion can only happen if there is a center seeking. Centripetal force and hanging force are each used to balance the system and the methods results are compared. 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. In this experiment, the relationship between force and acceleration are used to determine the mass of an object in uniform circular motion. Circular motion only occurs when an object is traveling in a circular path or an arc. Uniform circular motion physics 1430 with ta at university of north texas studyblue flashcards. I know the obvious errors are like the stopwatch not calibrated correctly, etc.
It can be uniform, with constant angular rate of rotation and constant speed, or nonuniform with a changing rate of rotation. Uniform circular motion an object moving in a circle at a constant speed. Centripital force apparatus tech tips with vernier youtube. Uniform circular motion home boston university physics. This happens due to a force pointed towards the center of the circle, called a. Uniform circular motion lab uniform circular motion lab. Written by teachers for teachers and students, the physics classroom provides a wealth of resources that meets the varied needs of both students and teachers. The state of illinois has declared a mandatory shutdown which is currently in place. There are many examples of uniform circular motion. The most important lesson from 83,000 brain scans daniel amen tedxorangecoast duration. Lab iv 1 laboratory iv circular motion the problems in this laboratory will help you investigate objects moving in uniform circular motion. By using a bucket filled with water, youll be able to understand how the centripetal force. Students may then see that even though the two objects exhibit different linear motion characteristics, they have identical angular velocities and accelerations. At a radius, r, from the center of the earth, the gravitational field strength, g, can be calculated as.
Help with centripetal force uniform circular motion. Also to use graphical analysis of circular motion to investigate relationships between the centripetal force and velocity. Uniform circular motion main concept angular velocity is a quantity representing how fast an object is moving around a given fixed point called the center of. In the figure, the velocity vector v of the particle is constant in magnitude, but it changes in direction by an amount. Understand that the centripetal force acting on or the centripetal acceleration of an object moving in a circular pattern is. In the uniform circular motion lab a group of students are to spin a 500 gram mass with a constant centripetal force of 5. That is, an object can be considered as consisting of many small point masses with constant distances.
We will be exploring this idea in this lab by comparing the centripetal force fc. Give them a push, let them roll, and catch them on the other side. To give you an idea of what this should look like, here is a youtube video demonstrating this type of lab. The direction of each arrow shows the direction of the push. Uniform circular motion united states naval academy. 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. A tirebalancing machine the wheel of a car has a radius of 0.
Apr 12, 2015 also, the object is undergoing acceleration directed towards the centre of the circle. The vernier centripetal force apparatus allows you to investigate the relationship between centripetal force. Circular motion lab report education data analysis great college. Sources of error for circular motioncentripetal force lab. Two experimental conditions were measured using 1 a simple pendulum and 2 a rotating table.
In your lab reports, describe how the timer calibration is done. Before the lab, check that all tubes are smooth on the top end. Chapter 5 uniformcircularmotion and centripetal force 5. Objective to find the centripetal force and centripetal acceleration by experimenting with horizontal circular motion with different masses. In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular path. Physics instruction using video analysis technology ap. We used logger pro to accurately measure the orbital period of the spinning mass and used these measurements to determine. Uniform circular motion is the motion of an object traveling at a constant uniform speed in a circular path. In this lab, students will use force sensors to study the centripetal force experienced by an object in uniform circular motion. 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. Without it, earth would move in a straight line and satellites would fall out of.
Thats what uniform circular motion is all about the changing of the velocity of an object as it travels in a circle at a constant speed. The rotation around a fixed axis of a threedimensional body involves circular motion of its parts. Uniform circular motion flashcards from victoria w. Shm, and uniform circular motion ucm are examples of simple motion that is. To achieve uniform circular motion, hold the tube vertically with the mass hanger at the bottom and spin the stopper around in a circular motion see figure 2. Without circular motion, life as we know it would not be possible. If r is the radius of the circle, the distance around the circle is 2. In this lesson, we want to examine the relationship a little further between linear and circular motion and develop a concept call centripetal acceleration. The hypothesis was valid, as the data and analysis showcased the following results. Uniform circular motion and centripetal acceleration. Centripetal force high school lab experiments pasco. In this lab, students will use force sensors to develop a kinesthetic understanding of circular motion. Chapter 5 uniformcircularmotion and centripetal force.
Students will measure the period of rotation of a mass in uniform circular motion. These conditions were observed by constructing a simple rotating. In this physics lab, well be examining the effect of centripetal force on an object moving in a circle. Motion of artificial satellites around the earth is an example of uniform circular motion. The physics classroom serves students, teachers and classrooms by providing classroomready resources that utilize an easytounderstand language that makes learning interactive and multidimensional. Use the strip timers to record the motion of two carts as they roll freely across the floor.
For human existence to endure, the earth must rotate in a circular motion around the sun. Each situation begins with a set of givens and is followed by a series of questions. September 27, 2015 page1%of%4% physics lab 4 sp211 uniformcircularmotion i. We are given the radius but must find the velocity of the satellite. Uniform centripetal motion is the motion of an object moving in a circle at a constant velocity. Ideally, a lab should show use some of the basic physics principles as well as have something the students can measure. Introduction to the dynamics of uniform circular motion.
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. Adjust the string to let the distance from the center of the rubber stopper to be 50 cm. In this experiment newtons first and second laws of motion were used to study and verify the expression for the force, f, to be provided to mass, m, to execute circular motion. Jomari mayo franklin avelino jeffrey ali hypothesis. 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.
Graphs of circular motion video analysis radius, linear velocity, centripetal acceleration the software also generates angular motion graphs figure 9. Use a force sensor to develop a kinesthetic understanding of circular motion by measuring the period of rotation of a mass in uniform circular motion. Video analysis of a bicycle wheel in uniform circular motion. This lab discusses centripetal force and uniform circular motion. User rept0n1x, via wikimedia commons newtons first law of motion states that an object moving at constant speed will continue that motion unless acted on by an outside force. Sometimes it is difficult to come up with new labs. Uniform circular motion is motion that occurs when an object has constant speed and a constant radius 2. Dec 06, 2009 help with centripetal force uniform circular motion i am writing a lab report on an experiment we did on uniform circular motion in class the other day so what we did was basically take a piece of string, tie a mass on one end of the string, poke the string through a straw, and tie the other end of the string to a large paper clip that. In this investigation, newtons laws of motion were used to study and verify the expression for the force, f, to be provided to mass, m, to achieve uniform circular motion. Relationship between the centripetal acceleration and the.
Uniform circular motion maple programming help maplesoft. A c entripetal acceleration is the instantaneous rate of change which acts towards the center of the circle. A whirligig is a toy that has two masses attached to each other by a string. Centripetal forces in order for an object to travel in a circular path, an unbalanced central force must be exerted upon it.
Uniform circular motion a constant motion along a circle. Students may then see that even though the two objects exhibit different linear motion characteristics, they. Place the alligator clip on the string 3 cm from the bottom of the tube see figure 4. To find the centripetal acceleration and centripetal force when a rubber stopper moves in a circular path as the other end of the string is connected to a hanging mass.
Review the key concepts, equations, and skills for uniform circular motion, including centripetal acceleration and the difference between linear and angular velocity. Safety precautions follow all normal lab safety rules. This happens because of a centripetal force, a force pointing towards the center of a circle. Science workshop and vernier graphical analysis software. The purpose of this lab is to determine the relationship between the frequency of revolution of an object in uniform circular motion hypothesis the equation represents the centripetal force on an object in uniform circular motion where fc is the centripetal force, m is the mass of the object undergoing circular motion, r is the radius of the circular path, and f is the frequency of revolutions of the circular motion. Uniform circular motion, motion of a particle moving at a constant speed on a circle. The gravitational force from the earth makes the satellites stay in the circular orbit around the. The purpose of this lab is to determine the relationship between the frequency of revolution of an object in uniform circular motion. Post lab analysis by varun patel on prezi presentation software.
The equation represents the centripetal force on an object in uniform circular motion where fc is the centripetal force, m is the mass of the object undergoing circular motion, r is the radius of the. Following are the examples of uniform circular motion. As another example consider a ball, attached to a string and whirled in a circle as shown in fig. Circular motion lab an object that moves in a circle at constant speed v is said to undergo uniform circular motion. Alternatively, we can also state that for a satellite in circular orbit that gravity supplies the unbalanced central force required to keep it in orbit. Lab 1 uniform motion graphing and analyzing motion. An observation of a circular motion using ordinary appliances arxiv. Uniform circular motion lab phys201l 015 frances hord and rima patel november 1, 20 abstract. As an essential business serving the needs of the education and healthcare communities, we will be continuing to process and ship orders as.
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. Alternatively, we can also state that for a satellite in circular orbit that gravity supplies the. This motion is called uniform circular motionmotion in a circular path at constant speed. The acceleration felt by any object in uniform circular motion is given by a. We know that in one day, or 86400 seconds, the satellite travels around the earth once. Uniform circular motion is motion in a circle at a constant speed. In addition, you will learn how to use video analysis software tracker to measure position as a. This is a simulation of a ball experiencing uniform circular motion, which means it travels in a circle at constant speed. This week you will be completing the circular motion lab page 59 from your lab manual. Uniform circular motion is the motion in which an object moves in circle at a constant velocity with a constant radius. So the lab involves swinging a string w rubber stopped attached to it in a circular motion.
Experiment 1 page 4 the portion of the data that is valid. Uniform circular motion pes 115 report objective the purpose of this experiment is to determine the relationships between radiuses, mass, velocity and centripetal force of a spinning body. Acceleration the rate of change of velocity per unit time. Engage your students during remote learning with video readalouds. The problems in this laboratory will help you investigate objects moving in uniform circular motion.
It is the force that keeps an object in a circular motion. This is the same motion that describes satellites in orbit around the earth, or objects whirled around on a rope. The maximum lift provided by a 500 kg airplane is 0 n. Jamer 1 introduction uniform circular motion occurs when an object goes around in a circle at constant speed. Double click on the vernierga icon in the physics folder to open the graphing analysis program, click on ok and click on the restore upper right center icon. 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 end circular motion lab dataresults all work is the same but has different values in period, mass, velocity, and radius. Otherwise, the object would continue to travel along a straightline path based on its inertia. Chapter 5 uniformcircularmotion and centripetal force name. Dont hit any computers or people while spinning the stopper. To their true circular motion while becoming acquainted with the software. Use the sliders to adjust the speed and the radius of the path.