Question

Q. 11



consider a block suspended from a stretched spring. On being released, it travels upwards to a certain point, then stops, reverses its direction of travel, and starts traveling down. The point where it stops corresponds to the point where (f denotes net force on block, k is kinetic energy of the block)

Answer 1

at equilibrium it has certain velocity whose force you are missing out thus not getting ... Is this answer still relevant and up to date? ... Mass-spring (M,K) system is oscillating vertically.