Question

define gravitational force​

Answer 1

Answer:

The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them.

Explanation:

Newton’s cannonball is a ‘thought experiment’ given by Newton, which leads to the hypothesis that the force of gravity is universal, and it plays a major role in planetary motion.

According to this thought experiment, he assumed a cannon on the top of a very high mountain peak. The following cases can arise if the cannon is loaded with gunpowder and fired.

If the speed of cannon is low, it falls on the Earth following a projectile motion.

If at that particular altitude, the speed of cannon is equal to the orbital speed, the cannonball will go on circling the Earth about a fixed orbit.

If the speed of the cannonball is higher than the orbital velocity but is insufficient to leave the Earth, i.e. less than the escape velocity of the Earth then, the cannonball continues to revolve around Earth in an elliptical orbit.

If the speed is equal to escape velocity or greater than that, the cannonball leaves the Earth in a parabolic or hyperbolic trajectory.

Answer 2

Gravitational force is the force of attraction on a body by earth.

• Example - Leaves and fruits fall from a tree downwards due to the gravitational force .