Is the bar in static equilibrium?

In summary, the bar has a fraction of 0.2 between both surfaces and weighs 5 kg. To determine if the bar is in static equilibrium, invent variables for the normal forces at the two ends and write equations for horizontal and vertical statics, as well as torque. Use a symbol for the angle and do not plug in numbers until the final equation.
  • #1
umchemist
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Homework Statement


sample2.png


uk of fraction between bar and both surfaces is 0.2. Bar weighs 5 kg.

i) Is the bar in static equilibrium? If not, which end will fall down and which end will go up?

Homework Equations



F-uk*Fn

The Attempt at a Solution



Not sure how to even begin analyzing this. I cannot visualize the bar moving in either direction first. Any guidance is appreciated.
 
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  • #2
Invent variables for the normal forces at the two ends. (Use different names.) Write the usual horizontal and vertical statics equations for the bar and one for torque. Use a symbol for the angle - don't plug in any numbers until the final equation.
 

1. What is static equilibrium?

Static equilibrium is a state in which all forces acting on an object are balanced, resulting in no acceleration or movement. This means that the object is either at rest or moving at a constant velocity.

2. How can you tell if a bar is in static equilibrium?

A bar is in static equilibrium if the net force acting on it is zero and the net torque (or rotational force) is also zero. This means that the bar is not moving and is not rotating.

3. What factors affect static equilibrium?

The factors that affect static equilibrium include the forces acting on the object, the distance between the forces, and the point at which the forces are applied. These factors can change the amount of torque and force acting on the object, and therefore affect its equilibrium.

4. Can an object be in static equilibrium if it is moving?

No, an object cannot be in static equilibrium if it is moving. Static equilibrium refers to a state of no movement, so if the object is moving at a constant velocity, it is in dynamic equilibrium instead.

5. Why is it important to understand static equilibrium?

Understanding static equilibrium is important in many fields such as engineering, physics, and architecture. It allows us to analyze and predict the behavior of objects under different forces and conditions, and design structures that are stable and safe.

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