If pieces of equal size of woods, wax and iron falling from a same height, which one will reach the surface of the earth first?

The two balls of iron and wood of same weight dropped from the same height in air, then –

If a feather, a rubber ball and a wooden ball are falling freely simultaneously from the same height in the vacuum, then

If the spinning speed of the earth increases, then the weight of the body at the equator will

If the gravitational force of the earth suddenly disappears, which are of the following will be the correct consequence?

Two objects of different masses falling freely near the surface of the Moon would