Which one of the Following Statements is not Correct?
- weight of a body is different on different planets.
- Mass of a body on the earth, on the moon and in empty space is the same.
- Weightlessness of a body occurs when the gravitational forces acting on it are counter-balanced.
- Weight and mass of a body are equal at sea level on the surface of the earth.
Answer: (4) Weight and mass of a body or equal at sea level on the surface of the earth.