answersLogoWhite

0

🧪

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 devices does gravity depend on to work?

Gravity needs no specific "devices". ANY mass in the Universe attracts ANY other mass. So, the only thing you need for gravity to work, is to have two objects that have mass - so basically, any two objects.

What is the lower specific gravity of oil?

The specific gravity of oil typically ranges from 0.8 to 0.98, with lighter oils like gasoline having lower specific gravity values around 0.7 to 0.8.

How do you calculate gravity In science?

In physics, gravity is typically calculated using the equation F = G * (m1 * m2) / r^2, where F is the force of gravity between two objects, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between the centers of the two objects. This equation is known as Newton's law of universal gravitation.

What is the balance of gravity and buoyancy?

The balance between gravity and buoyancy determines whether an object sinks, floats, or remains suspended in a fluid. Gravity pulls objects downward while buoyancy, an upward force exerted by the fluid, opposes gravity. When these forces are equal, the object remains in equilibrium and neither sinks nor rises.

Is air resistance a form of gravity?

No, air resistance is not a form of gravity. Air resistance is a type of friction that acts on objects moving through the air, slowing them down. Gravity, on the other hand, is the force of attraction between objects with mass.

How does gravity apply in real life?

Gravity is responsible for keeping us grounded on Earth, causing objects to fall when dropped, helping to create tides in the ocean, and allowing planets to stay in orbit around the Sun. It affects everything from the way we walk and jump to how satellites and spacecraft move in space.

What are two forces that act on objects?

Typically there is the force of gravity pulling an object down, and a force that keeps it up - for example, the floor on which an object is standing pushes it up. There may be additional objects involved.

How does speed traction and gravity affect braking distance?

Speed: As speed increases, braking distance increases because the vehicle has more kinetic energy that needs to be dissipated in order to come to a stop.

Traction: Higher traction allows the tires to grip the road better, reducing braking distance. Lower traction conditions, such as wet or icy roads, can increase braking distance due to reduced grip.

Gravity: Gravity affects braking distance by influencing the weight and load distribution of the vehicle. Heavier vehicles may have longer braking distances as it takes more force to slow them down compared to lighter vehicles.

How is gravity separation used in everyday life?

Gravity separation is used in everyday life for various purposes such as in waste treatment plants to separate different materials based on their weight, in mining operations to separate valuable minerals from gangue, and in food processing to separate grains from husks or shells. This technique relies on the differences in density of the materials being separated to effectively separate them using gravity as the driving force.

What is the effect of gravity on a falling object?

Gravity causes a falling object to accelerate towards the ground at a rate of approximately 9.8 m/s^2 (on Earth). This acceleration due to gravity increases the speed of the object as it falls towards the ground.

How does gravity make it easier to hammer a nail?

Gravity helps to increase the force with which the hammer strikes the nail, making it easier to drive the nail into the surface. Gravity pulls the hammer downward, increasing its velocity and impact force, which helps to overcome the resistance of the nail and drive it into the material.

What is the force that resists gravity?

The force that resists gravity is called normal force. It is the force exerted by a surface to support the weight of an object resting on it, acting perpendicular to the surface.

What is the range of gravity force?

The range of gravity force is infinite, meaning that every object with mass in the universe exerts a gravitational force on every other object with mass, regardless of how far apart they are. However, the strength of the force decreases with distance according to the inverse square law.

What is the meaning of gravity in science?

Gravity is a fundamental force in nature that attracts objects with mass towards each other. It is responsible for keeping celestial bodies like planets in orbit around the sun and for the falling of objects towards the Earth's surface. Gravity is described by the theory of general relativity proposed by Albert Einstein.

Why does gravity stop things from floating?

Gravity is a fundamental force that pulls objects towards each other. When an object is floating, it is being supported by another force, such as buoyancy or air resistance, that counteracts gravity. If these supporting forces are removed or weakened, gravity will pull the object back down.

What two factors does the strength of gravity depends?

The masses, and the distance. The formula for gravitional attraction is: F = G m(1) m(2) / r2, where G is a constant, m(1) and m(2) are the two masses, and r is the distance.

Why it is dangerous to jump from significant height?

Falling from a significant height will add more momentum to the falling object and according to one of the laws of gravity, an object in motion tends to stay in motion unless acted upon by another force, so once the falling object hits the ground the momentum will try to go through the ground but the falling object will hit the ground pretty forcefully. Also why am I here I have to study for exams

Why the mutual force of attraction between an apple and earth is equal and opposite but the apple moves towards the earth appear to be at rest?

The force of gravity between the apple and Earth is equal in magnitude and opposite in direction according to Newton's third law. The apple appears to be at rest relative to the observer due to gravitational acceleration being very small compared to the Earth's radius, making the apple's movement imperceptible.

What are the effects of gravity on a falling parachute?

Gravity pulls the parachute downward, causing it to accelerate towards the ground. As the parachute falls, air resistance increases, slowing down its descent. This gradual decrease in speed allows for a controlled and safe landing.

Why are magnets able to overcome force of gravity?

You don't specifically need a magnet to overcome the force of gravity; ANY force that is stronger than gravity can "overcome" it, at least temporarily. For example, if you lift an object up, you are "overcoming" the force of gravity.

In a grocery store you push a 12.3kg shopping cart with a force of 10.1N. If the cart starts at rest how far does it move in 2.5s (assuming no friction from the floor. Hint calculate the acceleration?

First, calculate the acceleration using the formula acceleration = net force / mass. Plug in the values to get acceleration. Next, use the kinematic equation, displacement = (initial velocity * time) + (0.5 * acceleration * time^2), where initial velocity is 0 since the cart starts at rest. Plug in the calculated acceleration and time to find the displacement of the shopping cart.

How does distance affect the strength of the force in gravity?

The strength of the force of gravity between two objects is inversely proportional to the square of the distance between their centers. This means that as the distance between two objects increases, the force of gravity between them decreases. This relationship is described by Newton's law of universal gravitation.

What is the meaning of gravity?

Imagine a table cloth held on by each corner above the ground. This is the universe. Put an apple on it. This is a planet. The apple makes a dent. This is gravity. Put grapes on the cloth. These are smaller planets. They are drawn to the apple. Put a soccer ball on the cloth. This is a very large planet. Everything moves towards it. Gravity.

How is acceleration in ocean waves?

Acceleration in ocean waves is influenced by factors such as wave height, wavelength, frequency, and the local wind conditions. As a wave approaches the shore, its acceleration increases due to the changing depth of the water and interactions with the sea floor. In deep ocean waters, the acceleration of ocean waves is generally low and only becomes significant near the coast.