## How many joules is the force of gravity?

The hammer’s weight, the force of gravity, is 20 newtons (recall it would accelerate at 10 meters per second per second under gravity, like anything else) so the work done in lifting it is force x distance = 20 x 5 = 100 joules, since lifting it at a steady speed requires a lifting force that just balances the weight.

**What formula is MGH?**

For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.

**How do you calculate gravity?**

To calculate the force of gravity of an object, use the formula: force of gravity = mg, where m is the mass of the object and g is the acceleration of the object due to gravity. Since g is always 9.8 m/s^2, just multiply the object’s mass by 9.8 and you’ll get its force of gravity!

### How much gravity is on earth?

9.807 m/s²

Earth/Gravity

**What does the H stand for in MGH?**

MGH where M stands for mass of the object given. G for the gravitational acceleration (can be taken 9.8 or 10 according to given data or your accordance. H stands for the height attained of the object. The height at which object is positioned is given by H. So that’s the expression for gravitational potential energy.

**What are the 3 laws of newton?**

The laws are: (1) Every object moves in a straight line unless acted upon by a force. (2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object’s mass. (3) For every action, there is an equal and opposite reaction.

## What is newton’s fourth law?

What is the fourth law of motion? “In Zero Gravity, how much is the speed added to an object, and the more that it is impacted, that much. will the object be moving in different ways.

**What is the equation for newtons universal law of gravitation?**

For two bodies having masses (m) and (M) with a distance (r) between their centers of mass, the equation for Newton’s universal law of gravitation is [ F = Gdfrac {mM} {r^2},] where (F) is the magnitude of the gravitational force and (G) is a proportionality factor called the gravitational constant.

**How is the value of the gravitational force calculated?**

The gravitational force can be measured by appropriate calibration. Since we know the value of masses and distances between them, the only unknown quantity is G in the universal law of gravitation. Thus, the value of G is calculated from the measured quantities.

### How are joules related to force and work?

In equation form: work (joules) = force (newtons) x distance (meters), where a joule is the unit of work, as defined in the following paragraph. In symbols: W = F x d In practical terms, even a small force can do a lot of work if it is exerted over a long distance.

**How did Sir Isaac Newton discover the law of gravitation?**

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.