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When a person walks on a rough surface the frictional force exerted by the surface on the person is opposite to the direction of the motion?
Wiki User
∙ 12y ago
Not if he picks up his feet while walking, only if he scuffs and slides his feet.
Wiki User
∙ 12y ago
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Why does a rubber ball bounce on a hard surface?
The energy exerted when the runner ball hits the hard surface is compacted and then repelled in the opposite direction. It's basic kinetics. :)
Does the frictional force depend on the area of surface contact?
No. Frictional force is independant of surface area.
When a body is placed on a surface it exert a force but the body does not move or fall why?
Because an equal and opposite force is being exerted on it.
What is surface roughness tester?
surface roughness tester is the machine which used to measure the roughness of the surface using probes... roughness is nothing but the frictional force applied by the surface to the adjacent surface.. if roughness increases the amount of frictional force increases..
What are the two main factors on which the force of friction depends?
The two factors that come into play when dealing with friction between a body and a surface: *The weight of the body, which is a function of the mass and the gravitational force said body experiences. Think about it. If you drag sandpaper across a surface, but you lift it up a bit as you drag it, it slides easier than if you let it slide naturally or push down on it. Lifting it up decreases the apparent wait the surface feels, and vice versa. Technically, it's the normal force, which is equal to the magnitude but opposite the direction, of the applied force, which is a composite of the weight and any push/pull force exerted, not the weight alone. *The frictional coefficient of the two surfaces (K), which varies for each surface based on the microscopic "unevenness" of the two surfaces and whether or not they are stationary or in motion. E.g. Glass is fairly smooth. Meanwhile, sandpaper has many bumps. The more bumps, the more often the surfaces catch each other and the higher the frictional coefficient K between the two. These coefficients have been measured in the lab and there is a list of frictional coefficients for various interacting surfaces that can be found in textbooks and on the internet. There are two types of frictional forces: static and kinetic. The static force is the force applied to the object while it stays stationary, up to a maximum force beyond which the two bodies overcome it and the applied surface moves. The kinetic force is the force the friction is applying to the two surfaces/bodies as the applied surface moves across the base surface, in the opposite direction of the direction of travel, known as displacement. The two equations describing the maximum static and the kinetic frictional forces are nearly identical in the form: F = u(Fn) F is the maximum static or the kinetic force, depending on the context, u is the static or kinetic coefficients, as denoted by an "s" or "k" subscript, respectively, and Fn is the normal force.
Why does a rubber ball bounce on a hard surface?
The energy exerted when the runner ball hits the hard surface is compacted and then repelled in the opposite direction. It's basic kinetics. :)
How does pressure exerted by a solid object on a surface differ from pressure exerted within a liquid or a gas?
The pressure exerted by a solid object is in only one direction.
How does pressure exerted by a solid object on a surface differ from pressure exerted within a gas or liquid?
The pressure exerted by a solid object is in only one direction.
Does the frictional force depend on the area of surface contact?
No. Frictional force is independant of surface area.
What direction does friction act in to an object's direction of motion?
Friction will always act in the direction opposite of the relativistic motion of two objects. If object A is moving to the right on object B, then object A will experience the friction to the left. However, object B will be moving to the left on object A and will therefore experience the friction acting towards the right.
Does an object always move in the direction of the unbalanced force exerted on it by another object?
Not always, the unbalanced force only points in the direction of the acceleration so a body may be moving in the opposite direction. Example. A car moves with some speed to the right on a horizontal surface and lock the brakes, if the surface has friction, but the net force acting on it is equal to the frictional force pointing left and produces a Deceleration of carriage until stop, but while this happens continuously in motion to the right.
What is the force exerted upwards from the ground?
In mechanics, the force exerted upwards by the surface that a body sits on is equal and opposite to the force exerted downwards by that body and is referred to as the Ground Reaction Force (GRF) or simply Reaction.
When a body is placed on a surface it exert a force but the body does not move or fall why?
Because an equal and opposite force is being exerted on it.
In which direction is pressure exerted in a fluid at rest?
If its in a container, pressure is downward and outward due to gravity and confinement respectively. If its on a flat surface without confinement, the pressure is exerted downwards on the surface and the boundaries are held by a combination of adhesion and cohesion.
What is the force exerted on a surface divided by the tota larea over which the force is exerted?
That's the average 'pressure' on the surface.
What is surface roughness tester?
surface roughness tester is the machine which used to measure the roughness of the surface using probes... roughness is nothing but the frictional force applied by the surface to the adjacent surface.. if roughness increases the amount of frictional force increases..
How does pressure exerted by a solid object on a surface differ from pressure exerted within a liquid or gas?
In a liquid or gas the pressure at any given point is the same in all directions. In a solid the pressure can vary depending on direction. So, for example, the vertical pressure can be greater or less than the horizontal pressure.
