/a-block-of-mass-2kg-is-pushed-along-a-table-with-a-constant-velocity-by-a-force-of-5N-when its push is increased to 9N what is the accelaration and the resultant force

Answer 1

The net force causing acceleration is 9-5 = 4
F = ma, so a = 4/2 = 2 m/s^2