Question
Suppose the law of gravitational attraction suddenly changes and becomes an inverse cube law i.e. F 1 r^ 3 , but still remaining a central force. Then
BITSAT
Physics
Gravitation
2021
BITSAT 2021
BITSAT Physics Question (2021) — Solution
Options
- A. Kepler's law of area still holds
- B. Kepler's law of period still holds
- C. Kepler's law of area and period still holds
- D. neither the law of area, nor the law of period still holds
Answer
A. Kepler's law of area still holds
Step-by-step solution
According to kepler's law of area d A dt = L 2 ~m For central forces, torque =0 L = constant d A dt = constant
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