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Lab 131

# Lab 131 - LAB 131 Mehar Ghei LABORATORY EXPERIMENT REPORT...

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LAB 131 Mehar Ghei LABORATORY EXPERIMENT REPORT Name: Mehar Ghei Group Members: Nicole Tran, Yvunne Chen, Nakib Junayed Experiment Date: Tuesday, October 19 th , 2010 Course Name: PHYS 111A Section: H01 Instructor: Beidi He LABORATORY #131 Centripetal Forces 1. OBJECTIVE Through experimentation, understand the motion of a pendulum and calculate the tension in the string of the oscillating mass and compare it to the maximum force measured by Logger Pro software. 2. THEORETICAL BACKGROUND = U mgh = K 12mv2 = W Fd = DW DU = ( + ) F m g v2r Pendulum movement is an example of rotational motion. The equations that describe the motion are: X) = Tsinθ max Y) + = mg Tcosθ may When θ is zero: X) = 0 ma Y) + = mg T may 3. EQUIPMENT The equipment used for both parts of this lab: Force Probe Page 1 of 5

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LAB 131 Mehar Ghei Mass attached to string Pole LoggerPro software Ruler 4. COLLECTED DATA Golden Ball: 72.36g and 85.7cm Force max (N) Tension (N) Period (s) Percent Error (%) 2.338 2.127 2.14 9.92 2.195 2.127 2.17 3.20 2.190 2.127 2.16 2.96 2.362 2.127 2.16 11.1 2.207 2.127 2.16 3.76 Page 2 of 5
LAB 131 Mehar Ghei Silver Ball: 24.46g and 98.5cm Force max (N) Tension (N) Period (s)

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