Gravity

Gravity is a fundamental force of nature that causes two objects to be attracted to each other based on their mass and distance. The second law of gravity does not exist; instead, there are various laws of physics that describe how gravity operates, such as Newton's law of universal gravitation and Einstein's theory of general relativity.

The amount of gravity acting on an object is its weight. Weight is the force exerted on an object due to gravity, and it is directly proportional to the object's mass.

Aside from the long-running Anti Gravity column in Scientific American, however, there is no such thing as antigravity. ... Only way out in deep space, beyond the domain of any planets or stars, can you truly escape gravity. As of yet, no technology exists to neutralize the pull of gravity.

Gravity problems refer to physics or engineering problems that involve calculating forces, accelerations, or motions related to the gravitational force between objects. These problems often involve concepts such as mass, distance, and the constant acceleration due to gravity (9.81 m/s^2 on Earth). Students and researchers commonly encounter gravity problems in fields such as mechanics, astronomy, and geophysics.

The net force is the sum of all forces - the vector sum.

If one pulls north, one pulls south, one pulls east, and one pulls west, and

each child pulls with the same force, then the vector sum of the forces on

the toy is zero, and it behaves as if there were no force acting on it at all.

No, the amount of gravity an object has depends on its mass. Objects with greater mass have stronger gravitational pulls.

A hockey puck of mass m = 0.25 kg is tied to a string and is rotating horizontally in a

circle of radius R = 1.0 m on top of a frictionless table.

Inertia is the resistance of an object to a change in its state of motion, while gravity is the force of attraction between objects with mass. Inertia keeps objects in motion or at rest until a force acts on them, while gravity pulls objects towards each other. Together, they determine how objects move and interact in the universe.

No, a gravity hammer cannot deflect Banshee missiles. The gravity hammer is primarily a melee weapon for close combat engagements, while the Banshee's missiles are launched from a distance and travel at high speeds, making it difficult to deflect them with a gravity hammer.

Gravity acts to keep the bicycle and rider grounded as they navigate different terrains, providing stability and balance. It also assists in maintaining momentum when going downhill and helps to keep the wheels in contact with the road for traction. Additionally, gravity interacts with the rider's center of mass to help in turning and leaning into corners.

Gravity is a force of attraction between two objects with mass, and it is commonly measured in newtons (N). Newtons are the unit used to quantify force, and in the case of gravity, it represents the amount of force with which an object is pulled towards the center of the Earth or any other massive body.

Refrigeration can potentially cause a decrease in urine specific gravity due to the effects of low temperatures on dissolved solutes in the urine, which can lead to crystallization or precipitation. On the other hand, refrigeration can also cause an increase in urine specific gravity if there is evaporation of water, concentrating the urine. Overall, the impact of refrigeration on urine specific gravity may vary depending on the specific composition of the urine and the conditions of refrigeration.

Gravity affects velocity by changing the acceleration of an object. As an object falls, gravity accelerates it, increasing its velocity. Without gravity, an object would move at a constant velocity.

The law of gravity, formulated by Sir Isaac Newton, states that every mass attracts every other mass in the universe with a force proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This is what causes objects to be pulled towards the Earth's center and governs the motion of celestial bodies.

To calculate the center of gravity for a taper shaft, you would need to consider the varying cross-sectional area along the length of the shaft. You can use an integral approach to determine the centroid of each cross-sectional area and then calculate the weighted average of these centroids to determine the overall center of gravity of the taper shaft. Alternatively, you can simplify the taper shaft as a series of smaller sections with uniform cross-sections and calculate the center of gravity for each section, then determine the overall center of gravity using the weighted average of these section centroids.

Yes, there is gravity in the asteroid belt, but it is much weaker than Earth's gravity due to the belt's low mass and spread-out distribution of asteroids. This weaker gravity allows the asteroids to remain in their orbits without being pulled together into a single body.

Mass and distance are the two factors that play an important role in gravity. The more massive an object is, the stronger its gravitational pull. Additionally, gravity weakens as distance between objects increases.

A gravity measurement of 0.907 refers to the specific gravity of a liquid, indicating its density relative to water. This measurement is commonly used in homebrewing to determine the potential alcohol content of a fermented beverage. A gravity of 0.907 typically suggests that fermentation is nearly complete, with only a small amount of residual sugars remaining in the liquid.

The gravity of Kepler 16b is likely similar to that of Saturn, which is around 1.07 times the gravity of Earth. This means that if you were standing on Kepler 16b, you would feel slightly lighter than on Earth.

The minimum force needed to go against gravity is equal to the force of gravity acting on the object, which is the object's weight. This force can be calculated using the formula F = m*g, where F is the force, m is the mass of the object, and g is the acceleration due to gravity (approximately 9.8 m/s^2 on Earth).

The center of gravity of a circular bangle is at the geometrical center of the bangle, which is also the center of the circle. This point is equidistant from all points on the circumference of the bangle, making it the point where the weight of the bangle can be considered to act.

The center of gravity is the point within an object or system where its weight is evenly distributed in all directions. It is the point around which the object will balance itself under the influence of gravity. It is a crucial concept in physics and engineering for understanding stability and balance in various systems.

Gravity increases with the mass of an object. The more massive an object is, the stronger its gravitational pull will be. This is why larger planets like Earth have a stronger gravitational force than smaller objects.

Gravity accelerates the centres of the two masses towards their joint centre of mass. Obviously, if there is a huge difference between the two objects, such as a ball and the earth, the centre of mass of the combined system will be indistinguishably close to the centre of the earth and so it will accelerate the ball towards the centre of the earth. Also, while it will accelerate the earth towards the ball, the force will be too small to measure.

I don't know the reason.

A lot of really clever people have used it, but I think it's more or less useless.

I used to like it, before I really thought about it.

The idea is that the ball distorts the rubber sheet just like mass distorts space.

The distortion of space (spacetime to be exact) is the basis of our modern understanding of gravity.

Some people like this analogy until you point out the problems.

Some things are just really hard to explain.

It was simpler with Isaac Newton. He just had no explanation for gravity.

OK, it's only an analogy, but here's one problem:

The rubber sheet is only 2 dimensional, of course.

Here's another problem : The whole analogy is meant to "explain" gravity.

What causes the ball (mass) to distort the sheet (space)?

The ball is pulled towards the Earth by.........gravity.

Yes, but no , well, I mean........