Units and Measurements Part 2

The time period of a simple harmonic oscillator is T=2π√‌

k

m

. Measured value of mass (m) of the object is 10 g with an accuracy of 10 mg and time for 50 oscillations of the spring is found to be 60 s using a watch of 2 s resolution. Percentage error in determination of spring constant (k) is ____ \%.