Gravitation 1 Question 1
4. The variation of acceleration due to gravity $g$ with distance $d$ from centre of the Earth is best represented by ( $R=$ Earth’s radius)
(2017 Main)
(a)
(b)
(c)
(d)
Show Answer
Answer:
Correct Answer: 4. (c)
Solution:
- Inside the earth surface
$g=\frac{G M}{R^{3}} r$
i.e. $g \propto r$
Out the earth surface $g=\frac{G m}{r^{2}}$
i.e. $g \propto \frac{1}{r^{2}}$
So, till earth surface $g$ increases linearly with distance $r$, shown only in graph (c).
