A spring of negligible mass stretches 3.00 cm from its relaxed length when a force of 7.10 N is applied. A 0.440-kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin to x = 5.00 cm and released from rest at t = 0. (ASSUME THAT THE DIRECTION OF THE INITIAL DISPLACEMENT IS POSITIVE.)
Determine the velocity and acceleration of the particle when t = 0.500 s. (Indicate the direction with the sign of your answer.)