For a total of 8 hours, Erica rode her motorcycle down a freeway at 80 kilometers per hour. There was a car behind her for one-quarter of that time. How far did Erica ride while the car
was behind her?

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.]