A man of $50\, kg$ mass is standing in a gravity free space at a height of $10\, m$ above the floor. He throws a stone of $0.5\, kg$ mass downwards with a speed $2\, m/s$. When the stone reaches the floor, the distance of the man above the floor will be …… $m$

At what height above the surface of earth the value of $"g"$ decreases by $2 \%$ ….. $km$ [radius of the earth is $6400 \,km$ ]

If density of earth increased $4 $ times and its radius become half of what it is, our weight will

At what depth below the surface of the earth, acceleration due to gravity $g$ will be half its value $1600 \,km$ above the surface of the earth

Average density of the earth