What is Gravitation, |Mass, |Weight, |Density

Why are the objects are falling to the ground?

Here the Earth have a mass.The mass will attract all the objects to the Earth surface.The force that pulls us towards the centre of the Earth is known as gravitation.But,this force of attraction is much less on the moon than on the Earth.Here is a processes,the astronauts bounce when they walk on the moon because they experience weightlessness.In the moon all are the objects are flying in air with all time.In the state of weightlessness we do not feel any force of gravity and do not feel any weight.Then the peoples who are went to the moon that the peoples have no mass on the Earth.However,we feel the forces acting on us on the Earth and When we fall from a height or when we are thrown forward when break are applied.

What is the weight,mass,and density?

In Earth all are the object have a mass.Because of the reason the force of attraction on the Earth,an object has a weight.Here is the force with which the body,here we can say that is the mass of the body-is attracted.On the moon the force gravity is just one-sixth of that the Earth.So,here a person weight has 60 kg in the Earth only 10 kg on the moon.The density of an object is the'mass per unit volume,for example space occupied by 1 kg of a substance.Because of the difference in their densities 1 kg of iron fits in a small cube,and 1 kg of feathers fills cupboard completely

Why don't satellites fall to the Earth?

The chairs of flying swings do not fly away because of the long chains holding them.Similarly,satellites remain in their orbits a gravitational attraction in the Earth.But,they has a skill in the their internal storage.They can tend to 'fly'away from the Earth owing to its inertia.At last they are shot off from the Earth with a large force.In this initial thrust is measured with the proper idea of rocket launching,the satellite continues to move in an orbit around the Earth at the calculated speed.

Why are we thrown forward when brakes are applied?

The object at rest tend to remain at rest,and the object are in motion tend to remain in motion.They should maintain their states in which they are currently present.Here we can take a simple example for motion.Once upon we standing in a bus,the driver will suddenly applies the brake.Our feet are in contact with the floor of the bus,but did not moves our body to forward.Then the same effect when the car takes a turn we feel a force pushing us in the opposite direction.This statement is also known us inertia of rest.This concept of inertia is used specifically to keep the satellites and space stations in their orbits around the Earth.

What is weightlessness?

The main point of weightlessness is defined as when the bodies do not'feel'any gravity.Gravity is that the force with which the earth pulls us towards its centre.When the weightlessness we can feel the free fall.Moreover,when two bodies are flying parallel to each other in the same gravitational field,they are should be weightless.Here we the ISS(International space station) has been orbiting in the gravitational field of the Earth.A weightlessness equipment that normally function with the help of gravity do not work.That for the toilets are equipped with suction devices,and one uses straws instead of cups to drink.

Why do astronauts wear spacesuits?

The astronauts are wear the spacesuits to survive and work they go for a walk in space.In the spacesuits have a supply of oxygen.The main purpose of the suits to product the radiations from the space.They are designed to insulate astronauts from severe temperature changes experienced in space,and the suits have some hollow spaces in their dress.They are filled with air pressure on the body is not present in space.In absence of these spaces blood supply may get collected in the lower half of the body.As a result,due to lack of bloods supply to the brain one may become unconscious.