Gravitation 1 - Mark Questions (Solved) CBSE Class 9 - Physics
Q1: Who formulated the universal law of Gravitation?
Answer: Isaac Newton
Q2: What is free fall?
Answer: When an object falls from any height under the influence of gravitational force only, it is known as free fall.
Q3: What is the value of gravitational constant G on the earth? Does the value G changes on the moon?
Answer: Value of gravitational constant on the earth is 6.67×10⁻¹¹ Nm²/kg². Value of G does not change (universal constant), it remains the same on moon.
Q4: What will happen to gravitation force between two bodies, if mass of one body is doubled?
Answer: Gravitational force will double also.