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

If a person sitting in a lift then when will he feel that his weight gets increased?

The weight of anybody is –

The mass of a body on the Earth is 100 kg, then the mass of the body on the Moon is :

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?

What will happen if an object is thrown into space with the speed of 8 km/s?