1.
A body of mass 0.5kg0.5\,\text{kg} travels in a straight line with velocity v=ax3/2v = ax^{3/2}, where a=5m1/2s1a = 5\,\text{m}^{-1/2}\,\text{s}^{-1}. The work done by the net force during its displacement from x=0x = 0 to x=2mx = 2\,\text{m} is