Lab 3:
Vectors and Statics
Quinton Candelaria
TA: Yian Song
Thursday 4:30
Abstract
This report presents another error propagation practice by measuring the force of three
pulleys and the error of the angle and direction.
In this lab Newton’s first law was used to show
that in equilibrium (when the ruler is stationary and balanced), the sum of all the torques equals
zero, from Newton’s law applied to torques. To have a net torque of zero the sum of the
clockwise torques must equal the sum of the counterclockwise torques.
We began the lab by
hanging three different weights from pulleys, two with set weights and angles and the third we
needed to find the necessary weight and angle to balance the other two out ( where the sum of
the three vectors equal zero).
We then found the error in the magnitude and angle as well as the
direction and error propagation in the x and y components of the third vector.
The results for the
third vector and its error in magnitude and direction were 165 + 2 g and 272 + 1 degrees.
The
results for the magnitude of the third vector for its x component was 5.76 + 2.88 g and the y
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 Spring '10
 COVATTO
 Force

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