Question

An object is raised from surface of earth to a height of two earth radii above it ,then its mass and weight both remain constant.

• A. True
• B. False

Answer 1

The correct option is B False

Mass

1. It is an intrinsic property of the material
2. It measures the amount of matter contained in an object.
3. It is independent of the location.

Hence, mass remains constant.

Weight:

1. It is defined as the force of gravity on an object.
2. Weight$W=mg$, where m= mass and g=acceleration due to gravity.
3. Acceleration due to gravity is dependent on locations. It is given by the expression $g=\frac{GM}{R^2}$
4. Thus, $W=\frac{GMm}{R^2}$
5. Weight is inversely proportional to the square of the radius.

When radius increases, weight decreases.

So, the statement is false.