
What is inertial mass and gravitational mass?
Important Questions on Gravitation

Which of the following observations point to the equivalence of inertial and gravitational masses?
The gravitational force on a particle inside a hollow isolated sphere is zero.



Which of the following observations point to the equivalence of inertial and gravitational masses ?
An astronaut inside a spaceship orbiting the earth feels weightless.




Which of the following observations point to the equivalence of inertial and gravitational masses ?
The gravitational force on a body due to earth is equal and opposite to the gravitational force on the earth due to the body.



Which of the following observations point to the equivalence of inertial and gravitational masses ?
Planets orbiting the sun obey Kepler's third law.

Which of the following observations point to the equivalence of inertial and gravitational masses ?
Time period of a simple pendulum is independent of its mass.



Which of the following observations point to the equivalence of inertial and gravitational masses ?
Two spheres of different masses dropped from the top of a long evacuated tube reach the bottom of the tube at the same time.



Which of the following observations point to the equivalence of inertial and gravitational masses?
For a man in a closed cabin that is falling freely under gravity, gravity 'disappears'.


