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?

• A. Time period of a simple pendulum on the Earth would decrease
• B. Raindrops will fall faster
• C. 'g' on the Earth will not change
• D. Walking on the ground would become more difficult

Answer 1

The correct option is C 'g' on the Earth will not change

$g=\frac{GM}{R^2}$,

g is depends in 'G', hence 'g' will change.

Hence raindrops will fall faster and walking on ground will more difficult.

Time period $\propto \frac{1}{\sqrt{g}}$, hence 'T' decreases.