6th May 2016
A raindrop falls on the earth with varying speeds depending on its size and weight. The gravity acts on the falling raindrop and the drop picks up speed. But due to air resistance, which is generally proportional to the velocity, the raindrops attain a terminal speed. A larger raindrop would fall much faster at 9 metres per second whereas a smaller raindrop will fall at a much slower speed of 2 metres per second.
29th April 2016
Mars is smaller than Earth. Its density and mass is also lower than earth. Since all these factors are lower, its gravity is also lower than Earth. In fact, the gravity on Mars is 62 per cent lower than Earth, meaning the Martian gravity is 38 per cent of the gravity on Earth. So a 50 kg person on Earth would weigh 19 kg on Mars.
8th February 2016
The moon exerts a pull on you when it is directly overhead, which cancels the gravitation pull of the earth on you slightly. Therefore, you weigh slightly less that time. Your mass however remains the same.