Can the coefficient of static friction be calculated from given information?

In summary, the question asks if it is possible to calculate the coefficient of static friction from the given information of a 10KG block resting on an inclined plane at 30 degrees. The answer is no, as the coefficient of static friction is a maximum value that depends on the force acting on the object, and since the block is stationary, the force of gravity is constant, making the coefficient of static friction unchangeable.
  • #1
Bailey
45
0
A 10KG block is resting on a plane inclined at an angle of 30 degrees from the horizontal. Find the force of frction holding the block stationary. is it possibel to calculate the exact coefficient of static friction from the above information? explain.


for this quesiton, I can find the force of friction. BUT, since:

static friction = coefficient of static friction * normal force

from the above equation we can solve for the exact coefficient right? since we know the normal force & the friction force.

now i know static frition will vary depending on the force acting on the object, but since the block is stationary, and the force of gravity acting on it is constant, which mean the coefficient of static will not change.

why can't we find the the coefficient of static friction?

:confused:

edit- ops...i just noticed...i should have posted in the classcial physics group...err...can some mod help me move this topic there?
 
Last edited:
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  • #2
Because the coefficient is the coefficient of MAXIMAL static friction,not the coefficent of static friction per se.
 
  • #3
ahhh......thx.
 

FAQ: Can the coefficient of static friction be calculated from given information?

What is static friction?

Static friction is a type of force that occurs when two surfaces are in contact with each other but not in motion. It prevents an object from sliding or moving when a force is applied.

How is static friction different from kinetic friction?

Static friction occurs when two surfaces are not in motion, while kinetic friction occurs when two surfaces are in motion relative to each other. Static friction is usually greater than kinetic friction, which makes it more difficult to get an object moving than to keep it moving.

What factors affect the strength of static friction?

The strength of static friction depends on the types of surfaces in contact, the normal force pushing the objects together, and any other external forces acting on the object.

How can static friction be measured or calculated?

Static friction can be measured using a spring scale or force meter, which measures the force required to overcome static friction and start an object in motion. It can also be calculated using the coefficient of static friction and the normal force acting on the object.

How does static friction impact everyday life?

Static friction plays a crucial role in many everyday activities, such as walking, driving, and gripping objects. It allows us to stay balanced while walking, maintain traction while driving, and hold objects in place without them sliding or falling. Without static friction, many tasks would be much more difficult or even impossible to perform.

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