The acceleration due to gravity on the surface of the Earth is:

$A$ ball is thrown up and attains a maximum height of $100 \, m$. It is thrown upwards with a speed of: (in $, m/s$)

What will happen if the force of gravity disappears suddenly?

$A$ man weighs $600\,N$ on Earth. What is his mass? $(g=10\,m s^{-2})$. On the Moon,his weight would be $100\,N$. What is the acceleration due to gravity on the Moon?

$A$ stone dropped from a certain height takes $4$ seconds to reach the ground. The height is: (in $, m$)

Distinguish between mass and weight of an object. How does the weight of an object change when moving from the equator to the poles? When can the weight of an object be zero?