Question

A block whose mass m = 4 kg is fastened to a spring with a spring constant k = 64 N/m. The block
is pulled from its equilibrium position on a frictionless surface and released. The period of the
resulting motion in seconds is
A) π÷4
B) π÷2
C) 2π
D) π​

Answer 1

If at t = 0 the particle is moving through its equilibrium position with maximum velocity in the negative x-direction then φ = π/2.