A small meteor starts from rest at a very large distance from the Earth and falls…

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A small meteor starts from rest at a very large distance from the Earth and falls radially inward. Ignore air resistance and let

R

be Earth’s radius. What will be its speed

v

when it is at a height

R

above Earth’s surface? (a)

v=\sqrt{\dfrac{2GM}{R}}

(b)

v=\sqrt{\dfrac{2GM}{3R}}

(c)

v=\sqrt{\dfrac{GM}{R}}

(d)

v=\sqrt{\dfrac{GM}{2R}}