A particle is placed at the origin and force is acting on it (where k is positive constant ).if the graph versus x will (where u is potential energy function) a)b)c)d) 
A particle is placed at the origin and force is acting on it (where k is positive constant ).if the graph versus x will (where u is potential energy function) a)b)c)d) 
(b) To leave the block, it oscillates in vertical plane. If maximum extension in spring in extreme position of block is , then Work done by weight of the block =Potential energy stored in spring
