Suppose universal gravitational constant starts to
decrease, then
(1) Length of the year will increase
(2) Earth will follow a spiral path of decreasing
radius
(3) Kinetic energy will remain constant
(4) All of these
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4
Answer:
1st and 2nd
Explanation:
Thus, T increases with decrease in G, thereby increasing the length of the year
. KE of earth = (1/2)MR2W2 = 2π2MR2/T2.
From kepler's law, R3 is proportional to T2 AND hence KE is inversely proportional to T2/3.
As G decreases T increases and increase in T decreases the KE
The radius of the path around the sun is proportional to T3/2. Thus if G decreases, T increases and hence R increases and earth will follow a spiral path
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