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

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

The Earth travels in its orbit at a speed of approx 4,400 km per hour. Why do we not feel this high speed?

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

If the distance between two objects is increased by two times, the gravitational force between them will

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