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Question:

If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?

Walking on the ground would become more difficult

Time period of a simple pendulum on the Earth would decrease

Raindrops will fall faster

'g' on the Earth will not change

Solution:

g=GM/R^2, g is dependent on 'G', hence 'g' will change. Hence raindrops will fall faster and walking on the ground will become more difficult. Time period ∝ 1/√g, hence 'T' decreases.