A meteor of mass starts from rest at a distance from the Earth’s centre

PHYSICS · Subjective · CBSE · Physics · Gravitation · Gravitation

Problem

A meteor of mass

200\,\text{kg}

starts from rest at a distance

4R_{\oplus}

from the Earth’s centre. Neglecting air resistance, find its speed when it reaches a distance

2R_{\oplus}

from the Earth’s centre. Express your answer in terms of

G

M_{\oplus}

and

R_{\oplus}