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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?

Asked in NEET 2018 · g from mass, radius and density

Answer: (4) g on the Earth will not change.

Step-by-step solution

The question asks which statement is false, so test each against how g changes.

Surface gravity on Earth is g=(GM_E)/(R²), and it involves the Earth's mass, not the Sun's.

Making G ten times larger therefore makes g ten times larger; the Sun's mass does not enter.

So g certainly does change, and the statement that it will not change is the incorrect one.

The other three all follow from a larger g: faster raindrops, harder walking, and a shorter pendulum period.

Why the other options are wrong

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