Physics lab 5

# Physics lab 5 - Jon Crowley Physics Lab Section 1 Andy and Brad Centripetal Force Lab Data Collection The purpose of this lab is to observe and

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Jon Crowley Physics Lab: Section 1 Andy and Brad Centripetal Force Lab Data Collection The purpose of this lab is to observe and measure the circular motion of a system in order to make numerical comparisons of different data. To do this lab, we used a system that could rotate freely and measure the time it took for an object in that system to make 50 revolutions. The system was comprised of a vertical shaft that could freely rotate to spin a massive bob. On top of the vertical shaft is a horizontal rod. At one end of the rod is the bob and at the other end is a counter weight which helps the shaft rotate evenly. A spring is connected to the vertical shaft and the bob. This spring provides force to pull the hanging mass toward the shaft. A vertical indicator at the base of the system is used to line up the bob while the system in motion. The bob is pulled over this vertical indicator by a string which runs over a pulley attached to a hanging weight. This weight is used to measure the force of the spring. A diagram of the system is shown below . Figure 1 : www . physics.fsu.edu At the start of this lab we measure the mass of the bob ( m ) and also the radius ( r ) of the horizontal rod from the center of the cross arm screw to the perpendicular rod supporting the bob. With the spring unattached, we then slid the indicator bar to the furthest position and let the bob hand directly over the indicator. The spring was then

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reattached which pulled the bob back towards the vertical shaft. The other end of the bob had an attached string which ran over a pulley. This string had a hanging mass (M) attached to the end of it. Weight was added to the hanging mass which was used to measure the force in the spring. Enough weight was added to bring the position of the
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## This note was uploaded on 04/12/2008 for the course PHYS 210 taught by Professor Marshland during the Spring '08 term at Northern Illinois University.

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Physics lab 5 - Jon Crowley Physics Lab Section 1 Andy and Brad Centripetal Force Lab Data Collection The purpose of this lab is to observe and

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