Please Select Chapter First !!
When the string is fully compressed.K.E. of the block = P.E. of the spring.
12mv2 = 12 Kx212×25×32 = 12×100×x2x=1.5 m
When the block comes to the original psotion, it will gain its K.E. from spring and the speed of the block will be same as before.⇒ V→=-3 m/s