A 0.4 kg mass takes 8 s to reach the ground when dropped from a certain height 'P' above the surface of the earth. The loss of potential energy in the last second of fall is _______ J. [Take g = 10 m/s2]

Who discovered the laws of motion and universal gravitation?

When applying the equations of motion to an object moving under gravitational force and thrown vertically upwards, the acceleration (a) should be taken as ______.

The motion of the Moon around the Earth is due to which of the following forces providing the necessary central attraction?