# UMass Amherst PHYSICS 131 - Circular Motion Lab (3 pages)

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# Circular Motion Lab

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## Circular Motion Lab

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Pages:
3
School:
University of Massachusetts Amherst
Course:
Physics 131 - Intro Physics I
##### Intro Physics I Documents

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Free Fall Lab Physics 131 NR Hasbrook 210 September 31st 2015 Abstract In this experiment we used a motion sensor to graph the free fall patterns of a gold ball and a human as they moved underneath the sensor This experiment is useful is showing the how objects change velocity and acceleration as they time goes by With the help of the computer program two graphs can be creates time vs position and time vs velocity to show the patterns tested by the sensor Questions 1 Uniform circular motion is when an object is moving around in a circular shape with a constant centripetal force acting upon it In the lab the bobber was moving around the circumference of a circle at a constant rate so the bobber was in circular uniform An object is accelerating if it is in circular motion because for something to be accelerating it must be changing speed or direction and the direction of the vectors changes as it moves Centripetal acceleration is measurement of motion that is applied to an object when it moves in a uniform circular motion There must be centripetal force acting upon the moving object The speed of centripetal acceleration is constant It is constant when the vector of magnitude is pointing towards the center of the object that is moving 2 The greatest effect on the magnitude of acceleration would be caused by reducing the speed by half For example we are able to test this by using the formula Fc Mv2r If we were to set a control group of M 10 v 10 and r 10 then the Fc would be 2000 If we divided the speed by two it would be M 10 v 5 and r 10 which is 3 When an object is moving around in a circular shape the centripetal force is the force that is directed at the center of that circular shape but acts on the object moving 4 By looking at the time vs velocity graph we can clearly see that when the graph goes below zero the velocity is negative This is the point when the ball is at the top of the jump and hitting the floor 5 The moments where the balls velocity is zero is

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