Year: 2016
Topic: Gravitation
Time :
1.
The ratio of escape velocity at earth (\(v_e\)) to the escape velocity at a planet (\(v_p\)) whose radius and mean density are twice as that of earth is
(1). \(1 : 4\)
(2). \(1 : \sqrt{2}\)
(3). \(1 : 2\)
(4). \(1 : 2\sqrt{2}\)