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Why an electric main switch is turned off by pulling the handle downward where as a general light switch is turned on by pressing downward?
Wiki User
∙ 12y ago
Ordinary household light switches are usually installed so that they turn off in the downward position. If yours turn on by pressing downward, it just means that someone installed them upside down.
Electrical mains are designed and installed so that gravity would tend to open them not close them.
Wiki User
∙ 12y ago
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What forces are at work on a floating object are they balanced?
Remember Newton's Second Law! If the object is not accelerating, then of course they are balanced.The main forces are: 1) gravity pulling downward, the fluid in which it is floating pushing upward.
In what direction do rocks above anormal fault surface moves?
In a reverse fault, compression (plates crashing together) causes the hanging wall to move up. In a normal fault, tension ( plates pulling apart) causes the footwall to push up.
Is there a maximum speed an object can achieve if dropped from a great height and if so what is it?
Yes, that is known as the terminal velocity. At that speed, the air resistance (pulling up) would be in equilibrium with the gravitation (pulling down), so there is no further acceleration. The terminal velocity depends on the object's size and shape. In general, heavier objects will fall faster.Yes, that is known as the terminal velocity. At that speed, the air resistance (pulling up) would be in equilibrium with the gravitation (pulling down), so there is no further acceleration. The terminal velocity depends on the object's size and shape. In general, heavier objects will fall faster.Yes, that is known as the terminal velocity. At that speed, the air resistance (pulling up) would be in equilibrium with the gravitation (pulling down), so there is no further acceleration. The terminal velocity depends on the object's size and shape. In general, heavier objects will fall faster.Yes, that is known as the terminal velocity. At that speed, the air resistance (pulling up) would be in equilibrium with the gravitation (pulling down), so there is no further acceleration. The terminal velocity depends on the object's size and shape. In general, heavier objects will fall faster.
Which planet has pulling power?
Neptune is the planet that has pulling power.Astronomers noticed that somthing was pulling Uranus from orbiting correctly.They did some research and found out the mystrey planet.
What two things determine the strength of gravitational pull?
First we must answer the question, "What is gravity?" There are many opposite charges that radiate electric fields. Two electric fields coming from opposite charges can pair up and travel through anything until they encounter opposite charges, such that the lower charge is pulled down first and then the upper charge is pulled down. The electric fields are absorbed by charges opposite from the ones that they originally came from. The time between the pulling down is according to the speed of light in the direction that the graviton was traveling. Only those gravitons that meet that special constraint are effective. That is why the gravitational "force" is so much weaker than the unpaired bare electric "force". The more gravitons (from a direction) meeting those dynamic conditions, the greater the force on an object. The proper answer is not exactly the mass of the object producing the gravitons for "doing the pulling", and the distance (r) from the pair of charges being pulled downward to the object producing the gravitons that will later do the pulling. This is because gravitons are absorbed, as they encounter opposite charges having just the right dynamical properties. Space opens up as r times r but only the remaining unabsorbed gravitons expand outwards for a while, as r times r. Because gravitons are actually discontinuous, with a large enough separation of r, it would be possible that there are no surviving gravitons, no matter what the mass of the object producing the gravitons. That is why the "universe" is expanding. With enough mass in the way, the gravitons are all eventually absorbed. Each bare charge is an infinite duration source of power. Each bare charge gives up a vast flux of electric fields radiating outward at the speed of light. Charges encountered by those electric fields have their momenta changed upon absorbing those electric fields. In the frame of the encountered charge before the electric field is absorbed, the charge afterwards has absorbed some energy from the electric field, as it is afterwards moving. Useful energy can be delivered to a mass rotating about a horizontal axis, according to the Bessler principle. There is actually nothing at all static about the electric field or the gravitational field. They both propagate at the speed of light in pure vacuum.
When do you notice the force of gravity?
When there is that force that pulls downward. Example, when you climb a mountain. You will fell that there is that gravity pulling downward.
A stack of books is pulling downward on the table what force is pulling down on it?
Gravity, which force will equal the weight of the books
What is the downward force on a submerged object?
The object's own weight is pulling it down.
What is the force that causes the box to move downward?
Gravity because it is pulling down the box
What exerts a pulling force on all matter on earth?
gravity at a downward force of 9.8m/s
What is the equal and opposite force to the downward force of gravity pulling on a man standing on the beach?
His weight.
Why fire does not comes downward?
The heat generated by the fire warms surrounding gasses and they rise, pulling the flame up.
What is meant by pull back effect when pulling in electrical cables in conduit?
what is meant by pull back effect when pulling in electric cables in conduit
What happens if you turn off the electric current in the solenoid?
If you turn off the electric current in the solenoid, the solenoid quits pulling its armature.
Which term is a pulling force exerted by solids?
Tension is a pulling force that is exerted by solids.
What allows you to hold things?
The force of your hands holding on two sides of the object you wish to hold. Although the gravitational force that is pulling the object downward is great; the force your hands are pressing onto the sides of the object is a lot greater. You will find that if you don't hold an object as tightly (decrease the force) it may drop. This is because the gravitational force increases.
What is the penalty for pressing a fire alarm on the train?
On a city rail train, the consequence of pulling a fire alarm for no reason, is a fine of $200
