Dr Gulshan S. answered 03/01/21
Tutor
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PhD In Physics and experience of teaching IB Physics and Math High sc
Time period of Oscillation T = 2∏ √(m/K)
Where m = mass , K = spring constant
T= 2*3.14 ( 1.2/665) 1/2 = 2*3.14*1.8045 * 10 -3 = 26.68*10-2 0.2667= 0.267 Sec