Gravity

I suggest start with Sir Issac Newton, maybe the story of the apple falling from a tree and hitting him on the head. Cover Newton's Laws of Universal Gravitation.

Work your way through history, and end with covering Einstein's Theory of General Relativity which amend Netwon's Laws into a more global description of gravity.

the grvitational pull of an object depents on its mass and density for power.

Anything that exists in the Universe experiences the force of gravity. This is a fundamental law of physics. The exact nature of gravity is unknown at this time and hotly debated. Practical things that apparently resist the force of gravity include magnetic levitation (maglev) and clever arrangements of gyroscopes, but their behaviour can be explained under general electro/mechanical laws.

Weight.

Your scale measures how much force your body exerts on it, relative to the gravity on Earth.

If you took your bathroom scale and used it on the Moon, it would show that you weigh a lot less!

Weight. As a scale works on the principle of measuring force, and weight is composed of force acting on a mass, it should properly say Newton, not Kilogram. However, we are not accustomed to using Newtons in ordinary use, so when a scale reports a Kilogram, what it really is reporting is the equivalent to 1 kg (of mass) operating under 1 g of gravity (thus, 1 scale-reported "kilogram" = 9.8 N)

The English system actually gets it right here (for a change), in that a scale registers Pounds (which are the English equivalent of Newtons, and a measure of force, not mass).

Gravity increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles. This means an object will weigh about 0.5% more at the poles than at the Equator.

"Easy" is not a quantity that's measured with any standard laboratory protocol,

and the question hasn't defined it for us. So we have to agree on how we'll measure

"easier" first, before we can go on to compare the two hypothetical situations.

We're going to propose three different measurements for "easy":

-- how much force it takes to snatch it up off the ground and hoist it to your

shoulder, in two seconds;

-- how fast it makes you breathe if you have to carry it a mile across the field

in 12 minutes;

-- if it's in a bag, how much total energy it takes to lift the bag off your back

and drop it in the bed of the truck, while the sweat runs down into your eyes

and the sun burns the back of your neck and you still have to shlep the plow

to the back door of the big house before sunset.

(We're really starting to get into this image of "cotton" now.)

Well, to make a long story short and spare the reader any further discomfort,

the answer is: There's not a whisker of difference. If the iron is really 1 kg and

the cotton is really 1 kg, then each one weighs the same 2.2 pounds, and all

of their physical and mechanical characteristics are identical, with the possible

exception of their sizes. But if the boss seals the kg of iron and the kg of cotton

in identical boxes, and adds a third sealed box containing a kg of taters, chitlins,

or dead mud puppies, then there's no way anyone can tell what's in which box.

They all feels and acts exactly the same, whether you tries to tote 'em, lift 'em, or

toss 'em, the lord makes each one just like all the others, can ya say 'praise him!' ?

Yes, when traveling uphill, it is generally recommended to use lower gears to maintain power and torque to overcome the pull of gravity. This will prevent the engine from straining and provide better control of the vehicle.

Without gravity, objects and beings would float in a straight line. Planets and stars would not form, and life as we know it would not exist. Gravity is crucial for the structure of the universe and for maintaining the orbits of celestial bodies.

Yes it does. All objects have gravity but the amount of gravity depends on the mass of the object.

no as it normally sinks down when put in water

Yes; very much so.

Otherwise the atmosphere would float out into space - and it is effectively, the atmosphere that delivers our weather.

If our gravity was more like the strength of Jupiter's, for instance, then, besides that our bodies would be extremely heavy and perhaps crush many of us, the air and any water droplets would also exert more pressure upon us - especially, in humid conditions.

The rain would fall sooner and more often due to its heavier weight.

Gravity affects the path of the arrow by pulling it downward, causing it to follow a parabolic trajectory. The arrow will be subject to the force of gravity from the moment it leaves the bow, leading to an arced flight path towards the ground.

The centre of gravity is the point trough which the whole weight of the object seems to act.

A projectile makes a curved path known as a parabolic curve when launched horizontally or at an angle. This curve is a result of the combined effects of gravity and the horizontal velocity of the projectile.

Yes, photons are affected by gravity. Gravity can cause light to bend around massive objects like stars or galaxies, a phenomenon known as gravitational lensing. This effect has been observed and confirmed through astronomical observations.

In a stretched string, the center of gravity refers to the point where the force of gravity can be considered to act on the entire string. It is typically located at the midpoint of the string's length when the string is held horizontally. This point helps determine how the string will behave under the influence of gravity and other external forces.

Take for example a dam, and the process which electricity is produced from water by gravitational force. When water rushes down the penstock into the turbine, it creates a rotational energy. The rotational energy is transfered to the spindle. At which point the spindle passes its energy off to an alternator. The alternator will create electricity. Thus, when you take gravity into account, water is a great potential energy. You need little to no fossil fuels to sometimes create more energy than a power plant. Simple and sweet too, I might have missed a couple key concepts

It's nominally 9.8 meters per second per second. The actual value varies slightly from place to place.

Gravitational energy is a type of potential energy that depends on the position of an object within a gravitational field. It represents the energy stored in an object due to its position in a gravitational field.

The force of gravity depends on the mass of objects and distance!

An object on the moon's surface weighs 0.165 as much as it does on the Earth's surface.

The classical idea about black holes is that in a black hole, mass is concentrated to an infinitely small size, so it has an infinite density. That would cause an infinite gravitational field. However, this infinite density, etc. seems doubtful in view of quantum physics - but what exactly happens near the center of a black hole has not been completely clarified yet.

Newton's First Law of Forces states a lot of things. One of these things are,

if an object is in motion, its net-force can not be zero.

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Hogwash ! Not only did Newton never make such a statement, it's not even true.

When the net force on an object is zero, it continues in constant uniform motion,

meaning constant speed in a straight line. If a net force is applied, then the speed

or the direction of the object's motion can change ... called "acceleration".

When an object is in motion, its momentum and kinetic energy are not zero.

A pull.

Gravity is always attractive, so in the long run, gravity is the deciding factor in the motions of planetary bodies