1.

By some means if universal gravitational constant (G) starts decreasing then

Answer»

time period of revolution of EARTH will increase.
length of day will increase.
Earth will follow a spiral PATH of increasing radius.
Kinectic ENERGY of earth will decrease.

Solution :`T = (2pi r)/(v) = (2pi r)/(SQRT((GM)/(r ))) ""` i.e., `T prop (1)/(sqrt(G))`
Further `K.E. = (1)/(2) mv^(2) = (1)/(2)m (GM)/(r )`
`K.E. prop G`
If G decreases, K.E. also decreases


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