PCS 211 Lecture Notes - Lecture 9: Circular Motion, Centripetal Force, Angular Velocity

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chocolatezebra508

1 Dec 2015

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Document Summary

The objective of this lab is to measure the centripetal force acting on a mass undergoing angular motion and its centripetal acceleration. An object moving along a circular path at constant speed v experiences uniform circular motion. Even though the object moves with constant speed it has acceleration due to the change in the direction of the vector velocity. Since its direction is towards the centre of the circular path in a radial direction this acceleration is known by the names of centripetal acceleration or radial acceleration. The magnitude of this acceleration is where r is the radius of the circular path. One can also express the centripetal acceleration in terms of the angular speed : To the centripetal acceleration corresponds a force, the centripetal force, whose magnitude is: since then and whose direction is evidently towards the centre of the path. pin m.

Related Questions

Introduction

This experiment involves centripetal force, the force that keeps objects moving in a circular path. This force is perpendicular to the motion and directed towards the centre of the circular orbit. By Newton's Second law when a centripetal force acts on a mass (in the horizontal plane), the force continually changes the direction of the velocity accounts for the centripetal acceleration of the mass, whose direction is towards the centre. The relationship between the centripetal force, the mass of the orbiting object, and its speed and distance from the centre are described by:

Extension Question:

When twirling the mass, students found that despite their best efforts, they could not swing the ball so that the cord remained exactly horizontal.

On the diagram of the rotating mass below, draw a force diagram of the force acting on the mass and identify each force. Don't include any force component in this diagram.