Question
The distance between Sun and Earth is R. The duration of year if the distance between Sun and Earth becomes 3 R will be:
BITSAT
Physics
Gravitation
2024
BITSAT 2024 (Memory Based Paper 2)
BITSAT Physics Question (2024) — Solution
Options
- A. 3 years
- B. 3 years
- C. 9 years
- D. 3 3 years
Answer
D. 3 3 years
Step-by-step solution
Basically 1 year is equal to time period of earth revolution around sun. So, T_i=1 year Now, T^2 R^3 ( T_2 T_1 )^2= ( R_2 R_1 )^3 T_2= ( R_2 R_1 )^ 3 / 2 T_1= ( 3 R R )^ 3 / 2 1 =3 3 years.
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