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What minimum horsepower must a motor have to be able to drag a 300 kg box along a level floor at a speed of 1.15 ms if the coefficient of friction is 0.50?
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What does 'co-efficient of friction' mean?
The amount of friction force that acts upon a body of mass depends on two factors: the property of the object and the normal force acting on the body. "Coefficient of friction" refers to the property of the material; in other words, the higher the coefficient of friction, larger the friction force is. The force of friction can be represented by this equation: FF = µFN. µ in this case represents the coefficient of friction. It can best be described as the numerical value that equates to the property of the object we are dealing with. µ does not have units; this reinforces the idea that it is just a numerical value that represents how "rough" or "smooth" the surface of an object is. Simply, the coefficient of friction is a way to describe, symbolically and numerically, how hard it is to move an object along a surface that the object is in contact with.
If you have to do 2.2 of work to push a 78- trunk 3.1 along a slope inclined upward at 22 pushing parallel to the slope What is the coefficient of friction between trunk and slope?
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What is the relationship between surface type and the amount of friction?
The magnitude of the force of friction is a function of the normal (perpendicular) force of the object and the surface properties of the two materials. It's a linear relationship; for example, if an object is sliding along a horizontal table with a weight of 2 lbs, then friction will double if an additional 2 lbs of force is added to the object.
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 type of friction is involved in train moving along a track?
Rolling Friction
A sled of mass 50kg is pulled along snowcovered flat ground the static friction coefficient is 0.30 and the sliding friction coefficient is 0.10?
Just multiply the weight by each coefficient, add them together and multiply by 9.8
What does 'co-efficient of friction' mean?
The amount of friction force that acts upon a body of mass depends on two factors: the property of the object and the normal force acting on the body. "Coefficient of friction" refers to the property of the material; in other words, the higher the coefficient of friction, larger the friction force is. The force of friction can be represented by this equation: FF = µFN. µ in this case represents the coefficient of friction. It can best be described as the numerical value that equates to the property of the object we are dealing with. µ does not have units; this reinforces the idea that it is just a numerical value that represents how "rough" or "smooth" the surface of an object is. Simply, the coefficient of friction is a way to describe, symbolically and numerically, how hard it is to move an object along a surface that the object is in contact with.
A sled of mass 53.0 kg is pulled along flat snow-covered ground The static friction coefficient is 0.30 and the kinetic friction coefficient is 0.10 a What force will be needed to start the sled movin?
Ignore the kinetic friction coefficient, that is only in the problem to trick you. If the force pulling the sled is parallel to the ground, then the problem should be pretty easy. Acceleration due to gravity = 9.8 m/s^2
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)]
If you have to do 2.2 of work to push a 78- trunk 3.1 along a slope inclined upward at 22 pushing parallel to the slope What is the coefficient of friction between trunk and slope?
hsfdugdjfkdvfhsg
What is the relationship between surface type and the amount of friction?
The magnitude of the force of friction is a function of the normal (perpendicular) force of the object and the surface properties of the two materials. It's a linear relationship; for example, if an object is sliding along a horizontal table with a weight of 2 lbs, then friction will double if an additional 2 lbs of force is added to the object.
Describe the factors that cause static friction between two surfaces to increase.?
A higher coefficient of static friction increases the static frictional force. A greater normal force also does this.
Which requires more force lifting the object or pulling the abject along a surface and why?
Pulling it along a surface basically because you don't have to support the weight... In terms of physics lifting the object requires you to counteract the force of gravity while if you push it you just have to overcome friction which is the friction coefficient multiplied by the normal force (which in many cases is the force of gravity)... And since the coefficient is always less than one the force will in all cases be less by sliding it.
What is the literal coefficient of 5x?
x the literal coefficient is the letter tagging along with the number coefficient (the number coefficient is 5, here). number coefficient is also sometimes called leading coefficient. literal coefficient is the variable (which is always a letter: English or latin).
What minimum horsepower must a motor have to be able to drag a 270 kg box along a level floor at a constant speed of 1.8 m s if the coefficient of friction is 0.45?
A 270 kg box weighsW = mgW = 270 kg * 9.81 m/s^2W = 2648.7 NThe force of friction is proportional to weight by the coefficient of friction:F_f = C * WF_f = .45 * 2648.7 NF_f = 1191.915 NPower is the multiplication of a force maintained through a parallel velocity - the force one must work against when dragging a box is the force of friction.P = F_f * vP = 1191.915 N *1.8 m/sP = 2145.447 WFinally, there are approximately 745.7 W in a hp:(2145.447 W) / (745.7 W per hp) = 2.877 hpAlso, your figures appear to have 2 sig figs, so approximately: 2.9 hp
What are the two factors that affect the amount of friction between two objects?
Friction is determined by the formula Friction = μFN or alternatively Friction = μFGcos(θ). Therefore the two factors are: (1) the coefficient of friction that depends on the two particular materials (μ) and (2) the normal force operating on the object that is pressing against a larger surface (FN / μFGcos(θ)). Normal force itself has three components upon which it depends: (a) the mass of the object upon which the force acts, (b) the gravity of the body on which the events take place (usually Earth), and (c) the angle of the surface as it deviates from a straight horizontal surface.
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.
