Shown in the figure a spring fixed at the bottomm end of all incline of inclination `37^@`. A small block of mass 2 kg starts slipping down the incline form a point 4.8 m aaway from the spring. The block compresses the spring by 20 cm, stops momentarily and then rebounds through a distance of 1 m up the incline. Find the spring constant of the spring Take `g = 10 ms^-2`