Two bodies having kinetic energy in the ratio 4 : 1, are moving with same linear velocity. The ratio of their masses is

Water is falling on the blades of a turbine from a height of $$25 \mathrm{~m}$$ and $$3 \times 10^3 \mathrm{~kg}$$ of water pours on the blade per minute. If the whole of energy is transferred to the turbine, then power delivered is

The range of a projectile is 100 m. Its kinetic energy will be maximum after covering a distance of

When a force F = 17 $$-$$ 2x + 6x$$^2$$N acts on a body of mass 2 kg and displaces it from x = 0 m to x = 8 m, the work done is