Define gravitational force in detail :)
Answers
Gravitational force
It is what decides how much we weigh and how far a basketball will travel when thrown before it returns to the surface. The gravitational force on Earth is equal to the force the Earth exerts on you. At rest, on or near the surface of the Earth, the gravitational force equals your weight.
I hope it's helpful :)
Answer:
According to Newton’s universal law of gravitation,
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.
Gravitational Force Formula
F∝G ( m¹ - m² )
r²
Where,
F is the gravitational force between two bodies
m¹ is the mass of the first body
m² is the mass of the second body
r is the distance between the centres of two bodies
The force exerted by two bodies with mass m1 and m2, whose centres is r units apart is given as:
F=G ( m¹ - m² )
r²
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