If a mass of 0,76 kg is hung from spring no. 2 what will be its change in length?

When a 2 kg mass is hung on a vertical spring, it extends the spring by 1.00 m. A kid runs towards the edge of a merry go round that is not rotating and How much force does it exert on the ground of the pool (fresh water, D) its travel direction may change & it may speed up/slow down A) 0 degrees