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Gravity
One of the four fundamental interactions, gravity is responsible for the fact that any objects with mass attract one another. According to general relativity, it is a space time curvature, but according to quantum mechanics it is the result of exchanges of virtual gravitons.
4,784 Questions
What is movement by water wind or gravity?
The process of movement by water, wind, or gravity is referred to as erosion. Erosion involves the transportation and displacement of soil, rocks, or other sediments by the action of water, wind, or gravity. This process plays a crucial role in shaping the Earth's surface over time.
What are the factors affecting the strength of the forces of gravity?
The strength of the gravitational forces between two masses depend on . . .
-- The product of the masses of the two masses, and
-- The distance between their centers of mass.
Is gravity field vector or scalar?
Gravitational field is a vector quantity, as it has both magnitude (strength) and direction. It represents the force experienced by a mass placed in the field due to the presence of another mass.
What is the specific gravity heavy fuel?
The specific gravity of heavy fuel oil can vary, but it typically ranges from 0.95 to 1.03. It is important to consult specific fuel oil specifications or test data to determine the precise specific gravity of a particular heavy fuel oil sample.
Do gravity affect the weight of an object?
Yes, gravity affects the weight of an object. Weight is the force exerted on an object due to gravity, so the strength of gravity directly impacts an object's weight. Objects will weigh less in a weaker gravitational field and more in a stronger one.
Why do plants respond light touch and gravity?
Plants respond to light touch through a process called thigmotropism, where they can change their growth in response to physical contact. Plants respond to gravity through gravitropism, which helps them orient their roots for water and nutrients and their stems for optimal light exposure. These responses are important for plant growth and survival in their environment.
How did the first person to discover gravity know it was gravity?
Sir Isaac Newton is credited with discovering gravity by observing an apple falling from a tree. He formulated the law of universal gravitation, which explains the force of attraction between all objects with mass. Newton's mathematical equations and experiments provided evidence for the existence of gravity and helped establish it as a fundamental force in the universe.
What is near weighlessness almost zero gravity?
Near weightlessness, or almost zero gravity, occurs when an object or person is in free fall, such as when skydiving or aboard an airplane in a parabolic flight path. In these conditions, the sensation of weight is greatly reduced due to the lack of support force from a solid surface, allowing for experiences similar to being in space. Astronauts in orbit experience true zero gravity due to the constant free fall around Earth.
How does gravity affect pushing and pulling?
Gravity is the attraction of mass to other mass. It is a "pull" rather than a "push" in that light.
Not really. This is a 17th century Newtonian way of looking at Gravity. A
According to Einstein's theory of General Relativity, gravity is a push. The space around an object is malleable and is warped by that object. So in Earth's case the Space is pushing us back down to earth.
There are many arguments for both pull and push when it comes to gravity, a search of the internet will lead you to many arguments for both push and pull
I disagree with the above Gravity is still a PULL rather than a PUSH Anyone else care to add ?
No it is a pushing effect. Think of earth as being immersed in pool of dark matter, which could also be described as Einstein's Space-time stuff, it is pressure of that displacement on neutral particles in your body and other everyday stuff that results in the downward force. An interesting fact that proves this is that as soon as you go underground you become slightly lighter. Another fact is that when you go into space just outside of the atmosphere you become weightless within a relatively short distance (Note from J. Craig: This is not true. You feel weightless if you are falling around the Earth, which is called orbit.). If it were a pulling force you would lose weight at the inverse square law and it does not happen that way. Also if you consider the Moon as shielding us from gravity rather than pulling us, it would create the same effect.
Now, while the above is a very good example of the theoretical background of the advancement of gravity discussions, it's mostly useless to someone wanting applicable knowledge about gravity.
With this said, gravity is BOTH a push and a pull. Think about a horse and carriage. To the observer, the horse is pulling the carriage. To the horse, however, it feels as though it's pushing on the chest brace to move the carriage. Even in engineering calculations using vector forces, the difference between push and pulldoesn't matter much when doing calculations with particle physics.
It should be of course both. There's no need to scientific detail. You just have to understand the definition of the words push and pull. Pushing simply means that the mass of the motivating force is coming from behind. Pulling means the mass of the motivation force is in front. The effects of gravity is seemingly tethered to all parts of our body, as if we were submerged in it, so it could be seen as doing both.
The difference between push and pull is merely a semantic argument.
Why won't a book resting on a table fall to the ground?
The book remains on the table due to gravity and the normal force exerted by the table upward, balancing the downward force of gravity acting on the book. As long as these forces are balanced, the book will remain at rest on the table.
Which possesses greater gravity Jupiter or earth?
Jupiter. It's gravity is 2.528 times greater than earths.
Under what circumstances would your weight become zero?
The weight will become zero under the following circumstances:
- In an artificial satellite
- During free fall
- At the centre of the earth
- At a point where gravitational pull of earth is equal to the gravitational pull of the moon.
Gravitational force is a result of distance and mass. If the 50 kg and 5 kg objects were extremely close to each other and the 2 50 kg objects were really far apart from each other, then the gravitational attraction between the 50 kg and 5 kg object could be greater. However, if they are the same distances apart, the attraction with the most combined mass will have the strongest gravitational force.
What is the law of gravity in child's understandig?
The law of gravity is a force that pulls things towards the Earth. It is what keeps us from floating off into space. Things fall to the ground because of gravity, and it is what makes objects feel heavy.
How many types of gravity are there?
There is only one type of gravity, which is the fundamental force that attracts objects with mass towards each other. It is described by the theory of general relativity proposed by Albert Einstein.
Gravity is the force of attraction between objects that is due to their masses.
How strong is gravity on Comet 67P?
Gravity on Comet 67P is much weaker than on Earth, as it has a mass that is only a fraction of Earth's. The surface gravity on Comet 67P is estimated to be about 1/100,000th of Earth's gravity, making it very low and allowing for objects to be easily lifted and moved around.
What types of shapes and forms seem to defy gravity?
Some examples of shapes and forms that seem to defy gravity include structures like cantilevered buildings or bridges, objects balanced on a single point, and artworks that give the illusion of floating or defying typical orientation. These designs challenge our perception of balance and stability, creating visual interest and a sense of awe.
How does gravity affect objects with different masses?
Gravity affects objects with different masses equally, causing them to be pulled toward the center of the Earth at the same rate. However, objects with greater mass will have a greater force of gravity acting on them, making it more difficult to move them or change their trajectory.
How do you increase and decrease gravity?
To increase gravity, you would need to increase the mass of the object or planet exerting the gravitational force. To decrease gravity, you would need to reduce the mass of the object or planet exerting the gravitational force. Another way to decrease gravity is by increasing the distance between the objects experiencing the gravitational force.
In the context of celestial bodies, gravity is greater on larger objects with more mass. For example, Earth's gravity is greater than the moon's gravity due to Earth's larger size and mass.
What property of matter does gravity depend on?
Gravity depends on the mass of matter. The larger the mass, the greater the gravitational force it exerts.
Is gravity and buoyancy the same size?
No, gravity and buoyancy are not the same thing. Gravity is the force of attraction between objects with mass, while buoyancy is the upward force exerted by a fluid that opposes the weight of an immersed object. Buoyancy depends on the density of the fluid and the volume of the object, while gravity depends on the mass of the objects involved.
Sentence describing gravity and weight?
Weight is a force equal to the product of an object's mass and gravity. Gravity in this context is not a force but an acceleration. Near the Earth's surface, that acceleration is 9.8 m/s², regardless of the mass.
