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)
(c)
(b)
(d)
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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).
