2. The spring has an upstretched length of 0.4 m and a stiffness k of 200 N/m. The 3-kg slider and attached spring are released from rest at 4 and move in the vertical plane. Calculate the velocity v, of the slider as it reaches B in the absence of friction. Answer: v= m/s. www. 0.8 m wwwwwwwww. 0.6 0.6 m B