A pendulum is made of a ( 251.3 ± 0.1) g mass and a string that is ( 1.3±0.005)m
ID: 1552860 • Letter: A
Question
A pendulum is made of a ( 251.3 ± 0.1) g mass and a string that is ( 1.3±0.005)m long. If the mass has a speed of (1.3± 0.1) m/s at the bottom of the swing: A) Calculate the centripetal of the mass ( with unsertainty)> B) use Newton's second law of motion to obtain the equation needed to solve for the tension. Note the free body diagram must be included. c) Calculat the tension in the string ( with unsertainty). Find the centripetal force acting on the mass ( with unsertainty) d) determine the centripetal force acting on the mass ( with uncertainty)
Explanation / Answer
A) a(cent) = v^2 / r = 1.3 ^2 / 1.3 = 1.3 m/s/s
B) Tension must supply both the centripetal force and the reaction to the gravity force
T = mg + m . v^2 / r
You just plug the numbers in
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