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What is the equation for how much work is done to overcome friction?
Wiki User
∙ 10y ago
Just use the basic definition of work. In the simplest case, the equation is:
work = force x distance
This implies that force is constant, and that the force acts in the direction of the movement. If the first assumption is not correct, integrals must be used; if the second assumption is not correct, only the component of the force in the direction of the movement must be considered, i.e., you take the dot product.
Wiki User
∙ 10y ago
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A car is moving straight down a highway What factor has the greatest influence on how much work must be done on the car to bring it to a complete stop?
FRICTION
Why does carpet have so much friction?
A carpet has so much friction because it has a coarse surface, causing the surface to rub against it and cause friction.
How is sliding friction shown in field hockey?
Sliding friction is shown in hockey when you hit the puck. The puck has friction against the ice (but there isn't much).
Use static friction in a sentence?
Lightening creates so much static friction that it can electrocute people
When do you need a little friction?
You need a little friction when you are going down a water slide and much more
How much torque that car wheel need?
Sufficient to overcome the inertia and friction of the vehicle.
How much work is performed when a 50 pound weight is moved 5 feet?
Here is the equation: W = 1/2 m(v22 - v12) As you can see from this equation, it could vary a lot depending upon how fast you moved it, whether you moved it straight up, straight down, to the side, how much friction there was, if you used wheels to reduce friction, what surface it was on.
How much minimum torque is required by a turbine to generate Electricity?
initial torque to overcome the friction in generator and then to keep constant speed of stator within the generator. Minimum 50NM
Why is the friction of rolling bodies less than that of sliding bodies?
Sliding friction is the force impeding movement as a result of two surfaces rubbing against one another. Imagine pushing a cardboard box of books across a concrete garage floor. Rolling friction refers to the frictional forces between a rolling tire and the pavement. The tire gets warm and an inflated tire rolls easier. The sliding friction is much more difficult to overcome than rolling friction.
A car is moving straight down a highway What factor has the greatest influence on how much work must be done on the car to bring it to a complete stop?
FRICTION
Why does carpet have so much friction?
A carpet has so much friction because it has a coarse surface, causing the surface to rub against it and cause friction.
What types of friction aren't used much?
There are three types of friction and all are all actually used often. These are static friction, rolling friction, and sliding friction.
What is friction between moving parts of an engine?
Friction is cut down in a car engine for two very important reasons. First, cutting down friction increases horsepower. It takes horsepower to overcome friction; so anything that can be done to cut down friction will increase the horsepower. Second, friction causes heat to be produced. Too much heat is bad, because if the engine gets too hot, then metal is softened and weakened, leading to failure of engine parts. The engine has a cooling system to remove unwanted heat, but too much friction would require a larger and more efficient cooling system to remove the excess heat, which would add expense and weight to the car. Motor oil is used to cut down the friction in the car engine. Also, very close tolerances in production of engine parts helps to cut down friction.
Why maglev train is faster than ordinary train?
Because there's no friction between the train and the track. In an 'ordinary' train, friction between the wheels and the rails takes a lot of energy to overcome before the train starts moving. In a Maglev train, the train itself actually 'floats' above the track on a 'cushion' of magnetic foirce. With no friction to slow it down, the train is capable of much higher speeds.
When is there not much friction?
on mars
Does rolling friction tend to oppose motion more than sliding friction does?
Generally, sliding friction is much stronger than rolling friction.
How do lubricants improve efficiancy?
Efficiency means how much work is done; efficient means less work to accompish the same task. Lubricants reduce friction, thus reducing the work that must be done to accomplish a task.
