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If the coefficient of static friction is 0.3 how much more force is needed to lift the object than start it sliding?
Wiki User
∙ 13y ago
for lifting the object there is no role of friction,but of air friction.since no info,. is given about it so air friction = 0.thereby for lifting we have mg = mass * 9.8 (the wight of the object). and for sliding we have 0.3*mg . therefore 0.7mg of more force is required to lift it.
Wiki User
∙ 13y ago
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Which is easier to stop sliding or rolling friction?
== == AnswersIt is easier to stop sliding friction than rolling friction. The force due to sliding friction will always be greater than the force due to rolling friction. And since friction force will be in the opposite direction of motion it will be easier to stop an object in motion that is sliding than one that is rolling.
How is friction related to net force on an object acceleration of an object a create sliding on a surface?
F net=F applied - F friction
How do you find the coefficient of static friction?
Use the formula: FsMAX=μsFN if you want to do it experimentally, get the two different surfaces, and angle one until the object on top starts moving. take the tangent of the angle that starts the objects sliding past one another, and that is your coefficient of static friction.
How does the coefficient of friction change with sliding velocity?
The relationship between the coefficient of kinetic friction ( denoted as uk ) and the mass, surface area, type of material or the speed of the object, is that the uk between a moving object and a non-moving object affects and distributes it on every points of an atom or molecule in all regions of both of the surface area of the two objects in contact with the object in motion, also the material from the object in motion relatively in contact to the surface of the other object which is not moving at all, determines the speed of the object, whether the material is rough that has lesser speed than that of a smooth surface or smooth vice versa.
How can you measure rolling resistance?
Roll the object down an inclined plane. Adjust the angle so that the objects rolls down without sliding at a constant speed. When that happens, the tangent of the angle of the plane relative to the horizontal is the coefficient of rolling friction.
Which would have more friction a small child or a 300 pound man sliding down a sliding board?
A 300 pound man would have more friction while sliding down a board, for one of the factors affecting friction is the force that an object is pushed on another, so the heavier object would have more friction. The formula for Friction is : F=uR - F:Friction u: coefficient of friction R:weight of object so as you times the weight by the coefficient the heavier object would produce a higher friction than a lighter one. :) hope this helped.
What type of friction slows down a sliding object?
sliding friction slows down a sliding object
The the value of the coefficient of friction the greater the resistance to sliding?
The larger the value of μ (aka Mu, the coefficient of friction, the greater the frictional force on an object. For instance, steel on nonlubricated steel has a μ of 0.58 while steel on lubricated steel has a μ of 0.06.
What is the definition of kinetic or dynamic friction?
Kinetic friction is commonly thought of as the friction between two objects while those two objects slide against each other. To determine the coefficient of kinetic friction (for an object under the influence of gravity on some surface), one needs to determine the angle at which the sliding object moves at a constant speed down the other object (think of a flat piece of rubber sliding down a flat plank of wood). This is different from static friction where the sliding object has some applied force to move along a surface, but that object is stationary because of the friction applied by the surface. To determine the coefficient of static friction, one needs to determine the angle at which the sliding object begins to move down the surface.
What is the definition of sliding friction?
The definition of sliding friction is the force that prevents a sliding object from moving.
What is the difference between sliding and rolling and kinetic and static friction?
Sliding friction is the friction between the body and the surface on which the body is sliding. Static friction however, is the friction when the body isn't moving when you aply force to it. The force of static friction is the same as the force you are pushing the body UNTIL it moves!..It's a fact that the static friction coefficient is a bit bigger than the sliding friction coefficient.
Why do automobiles require a push by heavy gear in the beginning of their movement?
According to the law of conservation of momentum, it is the nature of nature to keep objects moving at a constant velocity and in a straight line. That is true even when the speed of the object is zero. The amount of force needed to accelerate an object, which is to increase an object's velocity in the direction of travel, is directly proportional to the mass of the object. F=ma, where F is the resultant of all the forces acting on an object, m is the mass of the object, and a is the rate of acceleration of the object in the direction of the resultant force. Therefore it takes twice as much force to cause a certain rate of acceleration in a two-ton vehicle as it takes to cause the same rate of acceleration in a one-ton vehicle. Once the desired velocity is acheived, no more acceleration is needed; all that is needed to maintain that velocity is enough force to balance the forces of friction and air resistance. So if the vehicle were traveling in space, where there is no friction or air resistance, and if the object stays far enough away from the gravitational influences of large celestial bodies and dark matter, it would maintain the same velocity until the end of time. Another factor at work in this case is the difference between static coefficient of friction and kinetic coefficient of friction. Coefficient of friction is the ratio of the frictional force of two substances sliding against each other to the force holding the substances together. Any two substances, like rubber and rubber or ice and steel, have one static coefficient of friction, which pertains to starting a sliding motion from a standstill, and a kinetic coefficient of friction, which pertains to keeping a sliding object in motion once it is already moving. For a given pair of substances, the static coefficient of friction is always greater than the kinetic coefficient of friction; in other words, it always takes more force to start one object sliding on another than it does to keep it sliding. I know: vehicles don't slide, they roll. However, there is plenty of sliding going on in the engine, transmission, differential and wheel bearings.
What is the equation for sliding friction?
fk = uk*N Where fk = force of kinetic (sliding) friction uk = kinetic frictional coefficient (dependent on 2 materials sliding past each other) N = normal force (force being exerted perpendicular to the surface across which the object is sliding)
Name a variable that has no effect on friction?
Density, color, temperature, age, cost, taste, odor, beauty, or honesty of the sliding object have no direct relationship to friction.
When does sliding friction occur?
Sliding Friction Occurs When And Object Is Being Slided On The Ground
What are different forms of friction?
Static friction and sliding friction. Static friction is the force that stops a mass from sliding and sliding friction is the force that slows down an object that is already sliding. Static friction is stronger than sliding friction, and this difference is reflected in different coefficients of friction for sliding and static friction for a given surface.
The higher the value of the coefficient of friction the what resistance to sliding?
The larger the value of μ (aka Mu, the coefficient of friction, the greater the frictional force on an object. For instance, steel on nonlubricated steel has a μ of 0.58 while steel on lubricated steel has a μ of 0.06.
