PhysicsLAB Practice Problems
Frequency and Period #1

Directions: On this worksheet you will work with relationships between frequency, period, and length in a simple pendulum lab.

Question 1  During an experiment, data is collected on the vibrations of a simple pendulum. A graph of Period2 vs Length is plotted and forms a graph with a slope of 3.77 and a y-axis intercept of 0.07. Use the fact that the numerical value of the slope represents 4π2/g to determine the value of gravity in the lab room.
Question 2  If the accepted value for gravity at sea level is 9.8 m/sec2, What is the percent error for this experiment?
Question 3  According to the data summarized by this regression line, what would be the period of a pendulum that is 47 cm long?
Question 4  Which combination of vibrations could have been possible values for the 30-second trials when testing a 47-cm pendulum?
Question 5  The period of a simple pendulum can be calculated with the formula T = 2p SQRT(L/g). However, there is procedural error which must be accommodated when conducting the experiment in order to get the best possible experimental result. Which answer below best describes this error?
Question 6  Which variable was the dependent variable during this experiment?
Question 7  What is the frequency of a pendulum whose vibration graph is shown below if its 1st trough occured at 8.25 seconds and its last trough occured at 64.25 seconds .

Question 8  A group of children are playing jump rope. Each child stays in the middle for 4 minutes. If the frequency of the children spinning the rope is 0.47 hz, then how many times does each child jump while he/she is in the middle?

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