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Question
An astronaut inside a satellite is in a state of weightlessness because of the effect of
Options
inertia.
no acceleration.
zero gravity.
free fall towards the earth.
Solution
free fall towards the earth.
Explanation:
Earth's gravitational acceleration, g = `(GM)/R^2`
Where M is the earth's mass.
Because g is independent of the Sun's mass, an increase in G will raise the value of g. As a result, assertion (D) is erroneous.
Raindrop terminal velocity is also affected by g, hence an increase in g causes raindrops to fall faster.
As a result, assertion (A) is correct.
Walking on the ground becomes more difficult as the value of g increases. As a result, assertion (B) is correct.
The time period of a simple pendulum decreases as `T oo 1/sqrt(g)`. As a result, assertion (C) is correct.
