A Block Attached to an Ideal Spring of Force Constant

Multiple Choice

A block attached to an ideal spring of force constant (spring constant) 15 N/m executes simple harmonic motion on a frictionless horizontal surface.At time t = 0 s,the block has a displacement of -0.90 m,a velocity of -0.80 m/s,and an acceleration of +2.9 m/s² .The mass of the block is closest to

A) 2.3 kg.
B) 2.6 kg.
C) 4.7 kg.
D) 9.4 kg.