2a for example the first one,2sec. You know that every second it moves 3metres further. So 2x3=6 but you start at 0.50m so 6+0.50=6.5
The law of floatation states that, a floating body displaces its own weight of the fluid in which it floats.
The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy.
