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How to find the fraction of the rope that can hang over the edge of the table before it begins to slip with the coefficient of static friction?
Wiki User
∙ 14y ago
You are going to have to make a bunch of assumptions and simplifications. If you look at a real rope hanging over the edge of a real table you will see that , due to the fact that the rope has some stiffness, it does not make contact with the tabletop near the edge (or at least the contact pressure is less there) and the contact pressure at the edge can be rather high.
I will not go through the calculations (I've forgotten a lot of my "Statics" unfortunately).
Wiki User
∙ 14y ago
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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 force must you overcome to start an object moving?
Friction. Specifically, static friction. After the object begins to move, it will still be necessary to overcome rolling or sliding friction to keep it in motion.
What effect does friction have on motion?
Friction causes object in motion to slow down. As friction increases, it takes more and more energy for an object to keep its inertia (momentum) and it begins to slow down.
What is the force you have to overcome to start an object moving called?
I have to guess either gravity or friction.If by that you mean a force that opposes the start of motion, then your force would be static friction.Static friction only occurs before an object starts moving, as opposed to kinetic friction which occurs when the objects is moving or sliding. The equation for static friction is: Ff = (coefficient of static friction) * FNInertia
When does static electricity happen?
When friction is created by two objects that are moving but not relative to each other, its called static friction. Static friction keeps an object from moving until friction is created to move it.
How can an adjustable inclined plane be used to measure the coefficient of static friction and coefficient of kinetic friction?
Place the object on the plane. Slowly increase the angle of the plane until the object begins to move at angle Θ. The µs = tan Θ. For µk, same process, but give the object a little push at each increasing value of Θ.
The coefficient of static friction along an inclined plane is equal to tan alpha. What about the coefficient of kinetic friction?
It's not. The coefficient of static friction is only equal to the tangent of the angle of incline at the maximum angle before the object begins to slide. At this point static friction equals the component of the weight along the incline (weight X sin alpha). Static friction is given by the coefficient of static friction times the normal force (weight X cos alpha) fs = us N = us mg cos(alpha) Wx =mg sin(alpha) fs = Wx us mg cos(alpha) = mg sin(alpha) us = [sin(alpha)] / [cos(alpha)] = tan(alpha) Similarly, the coefficient of kinetic friction equals the tangent of the angle of incline only if the object is sliding down the incline at constant velocity (net force equals zero). If the object is accelerating along the incline (make this the x axis): Fnet, x = Wx - f max = mg sin(alpha) - uk mg cos(alpha) uk = [g sin(alpha) - ax] / [g cos(alpha)]
Why does the toys can stop before it begins to roll back to you?
Friction and air resistance. All of its kinetic energy gets converted to heat.
What is limiting value of friction?
The maximum friction that can be generated between two static surfaces in contact with each other. Once a force applied to the two surfaces exceeds the limiting friction, motion will occur. For two dry surfaces, the limiting friction is a product of the normal reaction force and the coefficient of limiting friction.
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 an example of being opposed by static friction?
When you move a heavy object, you must apply a lot of force before the heavy object begins to move. This resistance you feel while the box is NOT moving is static friction. Static friction opposes movement in an initially non-moving object.
What force must you overcome to start an object moving?
Friction. Specifically, static friction. After the object begins to move, it will still be necessary to overcome rolling or sliding friction to keep it in motion.
What type tempcoefficient does the zener diode have?
negative tempareture It depends on the reverse voltage. Up to about 5.6 volts, the zener has a negative temperature coefficient. Beyond 5.6 volts it begins to show a positive temperature coefficient.
What effect does friction have on motion?
Friction causes object in motion to slow down. As friction increases, it takes more and more energy for an object to keep its inertia (momentum) and it begins to slow down.
What fraction of the European Union begins with the letter L?
lagoons
A bungee cord begins to exert an upward force on a falinig bungee jumper?
Gravity, rope, and friction
'a Ultrasaurus' or 'an Ultrasaurus'?
"An" is used before a word that begins with a vowel while "A" is used before a word that begins with a consonant.
