Question

what remains constant while throwing a ball upwards

Answer 1

The acceleration due to gravity remains constant :)

Answer 2

$\large\underline\bold{Mass}$

• Well, yes it is the mass which remains constant.

• Generally, whenever a ball is thrown upward then for sure it would be not thrown with a velocity in comparison with the velocity of light.

• Therefore, the change in the mass of the ball will be negligible and can be take constant.

• In case if the ball is thrown with the velocity which is in comparison with the velocity of the light (3* 10^8 m/s^2) then the mass cannot be taken constant.