Two students use a pendulum to determine with a stopwatch of least count
PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
Two students use a 1.00m pendulum to determine g with a stopwatch of least count 0.1s. Student A records 50 oscillations in 99.0s, while Student B records 100 oscillations in 198.5s. Which statement correctly compares the relative precision of their calculated values of g?
(a) Both measurements yield approximately the same relative precision.
(b) Student B’s value is roughly twice as precise as Student A’s.
(c) Student A’s value is roughly twice as precise as Student B’s.
(d) Precision cannot be compared without the true value of g."