5) In a lab, a student is asked to roll a marble down a ramp from a height that will give it a velocity of 2.0 m/s at
ramp. From what height should the marble be released?
A)
10 cm
B)
20 cm
0
40 cm
D
The mass of the marble needs to be known to find the answer.

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.]