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What force is needed to slide a mass of 54 kg at a constant velocity along a surface on which the coeffcient of friction is 0.43?
Cashjohnson55
As mass is to be moved with constant velocity, so
a=0;
F(net)=0;
F-f=0;
F=f;
F=u*N;
F=u*m*g;
F=.43*54*9.8=227.556N...
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∙ 13y ago
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When and object slides over a smooth horizontal surface how does the force of friction depend on the force of gravity on the object?
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How do you raise and lower frictional forces?
A rough surface like sandpaper will have more friction than a smooth surface. smoothing out a surface will reduce friction
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If the object is moving along a horizontal surface with a constant acceleration,then the net vertical force on it is zero, and the net horizontal force on it is(the pushing force) minus (any kinetic friction force where it rubs the surface).The numerical value of that net force is(the acceleration) times (the object's mass).
When an object is pulling across a level surface at a constant velocity what force is the pulling force equal to?
Friction.
When an object is pulled on a level surface at a constant velocity what force is the pulling force equal to?
If there is no friction or anything that can impede the movement off the object, then the force is zero. If there is friction, then the force is equal to that of the friction.
Why a raindrop falling vertically through still air reaches a constant velocity?
The air resistance will increase to the point where it counters the downward acceleration.
State laws of friction?
There are five laws of friction. These include "within large limits, kinetic friction is independent of velocity" and "friction depends on the type of surface where contact is made."
What are the factors which affect the coefficient of static friction?
Dry surfacesFor low surface pressures the friction is directly proportional to the pressure between the surfaces. As the pressure rises the friction factor rises slightly. At very high pressure the friction factor then quickly increases to seizingFor low surface pressures the coefficient of friction is independent of surface area.At low velocities the friction is independent of the relative surface velocity. At higher velocities the coefficent of friction decreases.Well lubricated surfacesThe friction resistance is almost independent of the specific pressure between the surfaces.At low pressures the friction varies directly as the relative surface speedAt high pressures the friction is high at low velocities falling as the velocity increases to a minimum at about 0,6m/s. The friction then rises in proportion the velocity 2.The friction is not so dependent of the surface materialsThe friction is related to the temperature which affects the viscosity of the lubricant
Does friction increase as speed decrease?
Relative to its surface, friction is constant (this is known as the friction constant). The speed is decreasing on an object because friction is acting on it over a period of time, not because friction is getting stronger.
What is the difference between static friction and sliding friction?
Sliding friction is always less than the static friction by small amount.
A block is dragged at constant velocity in a straight-line path across a level surface by a force of 6 N what is the force of friction between the block and the surface?
'Constant velocity' means constant speed and direction. If the speed of the block is constant along the level block, then the net force on it in the forward direction must be zero. (It isn't accelerating.) You're pulling it in the forward direction with a force of 6 N. So the force of friction in the opposite direction must also be 6 N, for a total of zero.
Force that opposes motion of surface as it moves across another surface?
the force that opposes the motion of two touching surfaces is velocity.
Describe two forces that can affect an objects velocity?
Friction and Gravity are the two forces that affects an object's velocity. Friction is caused by both air and the surface on which an object is moving. Gravity is caused by Earth.
If you push a crate at constant velocity how do you know how much friction acts on the crate compared to your pushing force?
When an object moves at a constant velocity, all forces acting on it must add up to zero. In the case of the crate on a horizontal surface, where the pushing force is directly horizontal (not down and horizontal), then the human push force must be equal and opposite to the friction force. In the case where the plane is inclined and/or where the human force isn't directly along the surface, we need to know the angles, component-ize all forces (human push force, normal force, friction, and weight), balance forces in the direction perpendicular to the plane (so it will not sink through the plane), and balance forces parallel to the plane (if it is to move at a constant velocity).
When does an object have constant velocity?
An object has a constant velocity when it is not being acted upon by a force (or an unbalanced force) (zero is still a velocity). It is essentially impossible to have a pure constant velocity on earth because of gravity, friction, air resistance, and the rotation of the planet, the orbit of the planet around the sun, and the orbit of the sun around the Milky Way. However, in a single reference plane (the surface of the earth), one may be able to approach it as long as forces are balanced. Even in space, there are forces of gravity and rotational momentum that must be considered.
