Table of Contents

- 1 What does F GMM r2 mean?
- 2 What is the product of mass of a body and gravitation potential at a point?
- 3 Why did Newton assume inverse square dependence on distance in his law of gravitation?
- 4 What did Isaac Newton discover about gravity?
- 5 What is the value of G in the Universal Gravitation Constant?

## What does F GMM r2 mean?

Description. Sir Isaac Newton’s universal law of gravitation (F=Gmm/r2) is an equation representing the attractive force (F) of two masses (m) separated at distance (r). Force is proportional to mass and distance, related by a proportionality symbol known as the gravitational constant (G).

**When using Newton’s law of universal gravitation it is important to remember that the variable R represents what?**

When using Newtons law of universal gravitation it is important to remember that the variable ‘r’ represents what? The distance between the center of mass of each object. You just studied 39 terms!

### What is the product of mass of a body and gravitation potential at a point?

Key Points Near the surface of the Earth, the work done in lifting an object through a height h is the product mgh , so U=mgh . The gravitational potential energy, U , of a system of masses m1 and M2 at a distance r using gravitational constant G is U=−Gm1M2r U = − G m 1 M 2 r .

**Why is kinetic energy GMm 2r?**

The kinetic energy of a satellite is half the gravitational energy, given by, If the gravitational energy is GMm/r, then kinetic energy is GMm/2r and this kinetic energy is positive. This T.E. is negative, which means the satellite can’t leave or can’t just fly away in outer space and never come back to it.

#### Why did Newton assume inverse square dependence on distance in his law of gravitation?

The inverse square law proposed by Newton suggests that the force of gravity acting between any two objects is inversely proportional to the square of the separation distance between the object’s centers. He needed this UNSEEN FORCE at a DISTANCE to rationalize why the Moon was falling.

**What is Newton’s universal law of gravitation?**

Sir Isaac Newton’s universal law of gravitation (F=Gmm/r2) is an equation representing the attractive force (F) of two masses (m) separated at distance (r). It was first published as a part of Newton’s works on classical mechanics in the late 1600s.

## What did Isaac Newton discover about gravity?

Newton went on to discover the law of gravitation. According to Universal law of gravitation, the force between two bodies is directly proportional to their masses and inversely proportional to a square of the distance.

**What did Sir Issac Newton study with his famous law?**

Sir Issac Newton studied its behaviour with his famous law of gravitation. In physics, gravitation is defined as the force that attracts every object to the centre of gravity. In general, gravitation is the force exerted by the body due to the virtue of its mass.

### What is the value of G in the Universal Gravitation Constant?

The constant proportionality (G) in the above equation is known as the universal gravitation constant. Henry Cavendish experimentally determined the precise value of G. The value of G is found to be G = 6.673 x 10 -11 N m 2 /kg 2. The universal gravitation equation is represented in vector form as follows: