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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

How the speed of an object changes during a fall?

Since all objects have an acceleratio due to gravity of 9.8ms-1, the only thing affecting how fast it falls is the object's surface area.Weight has nothing to do with how fast things fall, only wind resistance. Take two 16 ounce soda bottles, open one drink eight ounces. The unopened bottle is twice as heavy as the opened bottle. Close the bottle you just drank half of and drop them at the same time from a tall building, they will hit the ground at the same time. That is because gravity is a constant and the velocity of any falling object is 9.8 meters per second/per second.

Acceleration is the same for all objects at m/s^2 (32.2 ft/s^2 or 22 mph) for each second of its descent. Thus, ignoring air resistance an object starting from rest will attain a velocity of 9.81 m/s after one second, 19.62 m/s after two seconds, and so on. If you are wondering why a hammer hit the ground before a feather, look at it's aerodynamic qualities, it has nothing to do with its weight. Air resitance depends on the

coefficient of drag and has nothing to do with weight.

When you are standing on the ground how much upward force is exerted on you by the earth?

When standing on the ground, the Earth exerts a force equal to your weight in the downward direction (gravitational force) and you exert an equal force in the upward direction on the Earth (reaction force) as per Newton's Third Law of Motion.

What is fullform of USG?

The full form of USG is Ultrasonography. It is a non-invasive imaging technique that uses high-frequency sound waves to create images of structures within the body, such as organs and tissues.

How you can measure specific gravity of Diesel?

To measure the specific gravity of diesel, you can use a hydrometer specifically designed for measuring the specific gravity of liquids. The hydrometer is floated in a sample of the diesel, and the reading on the scale will give you the specific gravity of the diesel. Make sure to calibrate the hydrometer at the correct temperature for accurate results.

What forces act on airplane to keep it at a level altitude?

If the aircraft's altitude is constant, that means its vertical speed is zero. That

indicates zero vertical component of any acceleration, which in turn implies that

vertical force components are balanced. So you can say with assurance that the

sum of (lift produced by the wings) PLUS (any vertical component of thrust due

to a positive angle of attack) is equal to the airplane's weight (gravitational force

on it).

How do you offset gravity?

Gravity can be offset by using a force in the opposite direction to counteract its effect. This can be achieved through methods such as propulsion systems or anti-gravity technology that generates a force equal and opposite to the gravitational force. However, fully offsetting gravity on a large scale is currently beyond our technological capabilities.

Why do you treat lower API gravity crude to meet product specification?

Lower API crude requires treatment in high temperature and longer retention time to meet proper oil production specification

Note - lower API (light crude) is free flowing while higher API (heavy crude) does not flow easily.

What is the magnitude of gravity near Earth's surface?

The magnitude of gravity near Earth's surface is approximately 9.81 meters per second squared (m/s^2). This value is known as standard gravity and represents the acceleration due to gravity experienced by objects falling freely near the Earth's surface.

What are the defects of simple barometer?

Some common defects of a simple barometer include susceptibility to changes in atmospheric pressure, limited accuracy compared to more advanced instruments, and the need for frequent calibration to maintain accuracy. Additionally, simple barometers may not provide real-time data or measurements for advanced weather analysis.

How does the height a boucny ball is dropped from effect the height it bounces to?

The higher the ball is dropped from, the higher it will bounce back. This is due to potential energy converting to kinetic energy upon impact with the ground, propelling the ball higher when dropped from greater heights. Ultimately, the bounce height depends on factors like gravity, air resistance, and the material of the ball.

What is the acceleration of gravity in meters?

"Meters" is not a unit of acceleration.

The acceleration of gravity on or near the surface of the Earth is about

9.8 meters/second2 .

It's different in other places.

Why is a waxed floor slippery to walk on?

Wax on a floor creates a smooth surface that reduces friction between your shoes and the floor, making it slippery to walk on. The wax fills in the small gaps and irregularities in the flooring, resulting in less traction for your shoes. Additionally, wax can become slick when it comes in contact with moisture or dirt, further increasing the slipperiness of the floor.

What is the opposite force of friction?

There is no force opposite to friction. In fact, friction is not actually a force, although

we treat it as if it were one, in order to make the math and physics easier.

The concept of a force opposite to friction might be 'lubricity' ... the ability of two surfaces

to slide past each other.

The opposite force of friction depends on all the other forces applied to any moving object,

since those determine the object's motion, and friction always acts in the direction exactly

opposite to the object's motion.

Is position a force?

No, position is not a force. Position describes the location of an object in space, while force is a push or pull that can cause an object to move or change direction. Position and force are related in physics, but they represent different concepts.

What is local gravity?

Local gravity refers to the gravitational acceleration experienced at a specific location on Earth's surface, which can vary depending on the mass distribution beneath that location. It is typically measured in units of meters per second squared (m/s^2) and can be influenced by factors such as altitude, latitude, and geological conditions. Understanding local gravity is important for applications in geophysics, surveying, and engineering.

Do meteors have surface gravity?

Yes they are. Every object that has mass follows the well known formulas

of gravity. Comets are no exception. Their orbits around the sun are perfectly

and completely described by the formulas of gravity.

Why you feel pressure from water?

Pressure from water occurs because water is a dense fluid. As you go deeper into water, the weight of the water above you increases, creating higher pressure. This pressure is felt on your body from all directions and can be significant at greater depths.

What forms when an artesian well begins to push out enough water that gravity causes it to flow to a lower region?

When an artesian well starts to push out enough water, the water will flow under pressure to a lower elevation, forming a flowing artesian well. The pressure from the confined aquifer pushes the water up and out of the well, and gravity then causes it to flow downhill or to a lower region.

When an object weighing 1N falls a distance of 1M How much work is done on the apple by the force of gravity?

Work = (force on the apple) x (distance through which the force acts).

Force on the apple = its weight = 1 n

Distance through which the force acts = 1 m

Work done by gravity = (1 newton) x (1 meter) = 1 newton-meter = 1 joule

Why does bouyant force act upward on an object submerged in water?

The buoyant force acts upward on an object submerged in water because of the difference in pressure between the top and bottom of the object. The pressure at the bottom of the object is higher than at the top, resulting in a net upward force on the object. This force is equal to the weight of the water displaced by the object, pushing it upward.

Is specific gravity part of complete blood count?

No, specific gravity is not typically included in a complete blood count (CBC). A CBC measures the counts and characteristics of different types of cells in the blood, such as red blood cells, white blood cells, and platelets. Specific gravity is a measurement of the concentration of particles in a fluid, commonly used in urinalysis.

What keeps us from feelings gravity?

The feeling of gravity is constant due to the Earth's mass, which creates a gravitational pull. This force keeps us grounded and affects everything on the planet. To experience weightlessness, one must enter an environment where gravity's effects are minimized, such as during freefall in space or on a parabolic flight.

What is difference between gravity and gravitational force?

Gravity is the natural force of attraction that pulls objects toward each other, whereas gravitational force is the specific force of attraction between two objects with mass. Gravity is a general concept that describes the phenomenon, while gravitational force refers to the specific interactions between objects due to their mass.

What is the value of 'g' if the earth stops rotating?

If the Earth were to stop rotating, the value of 'g' (acceleration due to gravity) would remain approximately the same at the Earth's surface. The rotation of the Earth does not significantly affect the gravitational pull experienced on the surface.

Why is gravity called gravity and not anything else?

The term "gravity" comes from the Latin word "gravitas," which means weight or heaviness. It was first used by Sir Isaac Newton in his work on the laws of motion and universal gravitation. The term has since become commonly used to describe the force that attracts objects with mass towards each other.