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Friction velocity is not dependent on velocity itself, but it is dependent on the shear stress at the wall. It is defined as the square root of the wall shear stress divided by the fluid density. The value of the friction velocity determines the intensity of turbulence in the flow.
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How much force do you need to keep a block at a constant velocity why?
To keep a block at a constant velocity, you need to apply a force equal in magnitude but opposite in direction to the force of friction acting on the block. This force is called the kinetic friction force and is dependent on the coefficient of friction between the block and the surface it's on.
Does friction affects velocity ratio?
Friction can have an impact on velocity ratio by reducing the efficiency of a system. Friction can transfer energy into heat, causing a loss in velocity and making it more difficult to maintain a consistent velocity ratio. Reducing friction through lubrication or other means can help improve the velocity ratio.
How does friction affect the velocity of a train?
Friction between the train wheels and the tracks can slow down the velocity of a train by converting its kinetic energy into heat. Higher friction can cause more resistance, which can decrease the train's velocity. Conversely, lower friction or well-lubricated tracks can reduce the impact of friction on the train's velocity.
What is greater static friction or kinetic energy?
Static friction is typically greater than kinetic friction because it prevents an object from moving initially, requiring more force to overcome. Kinetic energy, on the other hand, is the energy possessed by a moving object and is dependent on its mass and velocity.
How will the velocity of the book change as it moves across a surface with no friction?
The velocity of the book will remain constant as it moves across a surface with no friction.
How much force do you need to keep a block at a constant velocity why?
To keep a block at a constant velocity, you need to apply a force equal in magnitude but opposite in direction to the force of friction acting on the block. This force is called the kinetic friction force and is dependent on the coefficient of friction between the block and the surface it's on.
Is friction the rate of change in velocity?
Acceleration is the rate of change in velocity. It has nothing to do with friction, unless friction is causing the change.
Is terminal velocity a type of friction?
No. Terminal velocity is a particular kind of velocity and friction is a particular kind of force. The terminal velocity of a falling object is the maximum velocity it can have because air resistance prevents it from going any faster. And air resistance is a type of friction. So terminal velocity is due to a type of friction.
Does friction affects velocity ratio?
Friction can have an impact on velocity ratio by reducing the efficiency of a system. Friction can transfer energy into heat, causing a loss in velocity and making it more difficult to maintain a consistent velocity ratio. Reducing friction through lubrication or other means can help improve the velocity ratio.
What are the two factors that affect the friction force between two surfaces?
The strength of the force of friction depends on the types of surfaces involved and on how hard the surfaces push together.
What is dependent value in velocity time graphs?
A dependent value in a velocity-time graph is the velocity of the object being measured at different points in time. It is the vertical axis value that is influenced by the independent variable, time, on the horizontal axis. The dependent variable changes as a result of the independent variable.
How does friction affect the velocity of a train?
Friction between the train wheels and the tracks can slow down the velocity of a train by converting its kinetic energy into heat. Higher friction can cause more resistance, which can decrease the train's velocity. Conversely, lower friction or well-lubricated tracks can reduce the impact of friction on the train's velocity.
What is greater static friction or kinetic energy?
Static friction is typically greater than kinetic friction because it prevents an object from moving initially, requiring more force to overcome. Kinetic energy, on the other hand, is the energy possessed by a moving object and is dependent on its mass and velocity.
How is friction a force?
Due to friction velocity of a body gets reduced, reduction in velocity causes change in velocity. This change in velocity leads to production of acceleration.(Because only acceleration can produce change in velocity either its direction or its magnitiude). And only a force can cause the acceleration hence friction is a force.
How is friction force?
Due to friction velocity of a body gets reduced, reduction in velocity causes change in velocity. This change in velocity leads to production of acceleration.(Because only acceleration can produce change in velocity either its direction or its magnitiude). And only a force can cause the acceleration hence friction is a force.
How will the velocity of the book change as it moves across a surface with no friction?
The velocity of the book will remain constant as it moves across a surface with no friction.
What is the work done by static friction always dependent on?
The work done by static friction is always dependent on the displacement of the object it acts on.
