Two bodies were thrown simultaneously from the same point at time t = 0, one straight up and other at an angle 30° with the horizontal with equal intial speed of 30 m/s. The magnitude of relative velocity of two bodies attime t=1swillbe(g=10m/s2) (1) 30 m/s (2) 20 m/s
(3)57m/s (4)105m/s

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]