Note: In this experiment, a pendulum and a bob are the same thing they are the masses at the end of – the string we will use different size nuts. – Procedure and Data Collection: Determine the mass of the pendulum bob (our pendulum bob is just a nut from a bolt it was – cheap!) Attach the bob to a string measure the string length. – Hold one end of the string on the fulcrum of your set-up. Displace the bob sideways. Determine the number of swings (estimate a fraction of a swing) in 10 seconds. Repeat for other string lengths, displacements and bob masses for the various experiments below. Bob Masses (grams) Bob Size Mass (g) Big Bob Medium Bob Little Bob Experiment A: String Length = 12 in. Bob Size Number of Swings in 10 seconds. (pull the bob back about 2 in.) Big Bob Medium Bob Bob Does the mass of the bob matter? Experiment B: Select a Big, Medium or Small Bob (use one bob size, it does not matter) String Length Number of Swings in 10 seconds. (in) (pull the bob back about 2 in.)
Note: In this experiment, a pendulum and a bob are the same thing – they are the masses at the end of the string – we will use different size nuts. Procedure and Data Collection: Determine the mass of the pendulum bob (our pendulum bob is just a nut from a bolt – it was cheap!) Attach the bob to a string – measure the string length. Hold one end of the string on the fulcrum of your set-up. Displace the bob sideways. Determine the number of swings (estimate a fraction of a swing) in 10 seconds. Repeat for other string lengths, displacements and bob masses for the various experiments below. Bob Masses (grams) Bob Size Mass (g) Big Bob Medium Bob Little Bob Experiment A: String Length = 12 in. Bob Size Number of Swings in 10 seconds. (pull the bob back about 2 in.) Big Bob Medium Bob Bob Does the mass of the bob matter? Experiment B: Select a Big, Medium or Small Bob (use one bob size, it does not matter) String Length (in) Number of Swings in 10 seconds. (pull the bob back about 2 in.)