A point mass x = 20 kg, is suspended by a massless spring of constant 2000 N/m. The point mass is released when elongation in the spring is 15 cm. The equation of displacement of particle as function of time is (take, g =`10m//s^(2)`)
A. y = 10 sin 10t
B. Y = 10 cos 10t
C. `y=10 sin(10t+(pi)/(6))`
D. None of these
