GravitationHard
Question
If the distance between the earth and the sun is half of its present value, the number of days in year would have been
Options
A.64.5
B.129
C.182.5
D.730
Solution
From Kepler′s third law
T2 ∝ (r)3 or T ∝ (r)3/2
∴
or T2 T1 ×
= (365) × 
T2
129 days.
T2 ∝ (r)3 or T ∝ (r)3/2
∴
or T2 T1 ×
= (365) × T2
129 days. Create a free account to view solution
View Solution FreeMore Gravitation Questions
A particle of mass 10 g is kept on the surface of a uniform sphere of mass 100 kg and radius 10 cm. Find the work to be ...When a satellite in a circular orbit around the Earth enters the atmospheric region, it encounters small air resistance ...Two identical satellites are at the heights R and 7R from the Earth′s surface. Then which of the following stateme...Planck's constant (h), speed of light in vacuum (c) and Newton's gravitational constant (G) are three fundamenta...Two particles of equal mass m go round a circle of radius R under the action of their mutual gravitational attraction. T...