Podcast
Questions and Answers
What is the purpose of dynamic force analysis?
What is the purpose of dynamic force analysis?
- Studying the equilibrium positions
- Determining the accelerating couple
- Calculating the inertia force
- Evaluating input forces or torques (correct)
How is the inertia force defined?
How is the inertia force defined?
- An imaginary force bringing a rigid body to an equilibrium position
- Mathematically expressed as F x h
- Opposite in magnitude and direction to the accelerating force (correct)
- Equal to the accelerating couple in magnitude and direction
What is the relationship between inertia torque and accelerating couple?
What is the relationship between inertia torque and accelerating couple?
- They have the same magnitude and direction
- They are mathematically expressed as F x h
- Inertia torque is equal to the accelerating couple in direction
- Opposite in magnitude but equal in direction (correct)
How can a system of forces acting on a rigid body be reduced?
How can a system of forces acting on a rigid body be reduced?
What creates a couple on a rigid body?
What creates a couple on a rigid body?
What is the inertia torque?
What is the inertia torque?
What term describes the distance a screw thread advances axially in one turn?
What term describes the distance a screw thread advances axially in one turn?
Which type of thread is stronger and offers more resistance to motion than square threads?
Which type of thread is stronger and offers more resistance to motion than square threads?
What is the principle on which a screw jack works similar to?
What is the principle on which a screw jack works similar to?
What is the curve traced by a particle moving along a screw thread at a uniform speed?
What is the curve traced by a particle moving along a screw thread at a uniform speed?
Which type of screw threads are generally used for tightening pieces like bolts and nuts together?
Which type of screw threads are generally used for tightening pieces like bolts and nuts together?
What term refers to the difference between the top and bottom surfaces of a screw thread?
What term refers to the difference between the top and bottom surfaces of a screw thread?
What does D-Alembert's principle state about the resultant force and inertia force?
What does D-Alembert's principle state about the resultant force and inertia force?
What is the equivalent static problem obtained from reducing a dynamic problem using D-Alembert's principle?
What is the equivalent static problem obtained from reducing a dynamic problem using D-Alembert's principle?
Which type of screw threads are used in screw jacks and vice screws?
Which type of screw threads are used in screw jacks and vice screws?
What does the equation F + FI = 0 represent in D-Alembert's principle?
What does the equation F + FI = 0 represent in D-Alembert's principle?
What is the main function of a screw jack?
What is the main function of a screw jack?
In the context of a screw jack, what does the coefficient of friction µ represent?
In the context of a screw jack, what does the coefficient of friction µ represent?
What is the relationship between the effort applied (P) and the load (W) in a screw jack?
What is the relationship between the effort applied (P) and the load (W) in a screw jack?
When using a V-thread, how does the normal reaction between the screw and nut differ compared to a square threaded screw?
When using a V-thread, how does the normal reaction between the screw and nut differ compared to a square threaded screw?
In a journal bearing, what happens when there is no lubrication present?
In a journal bearing, what happens when there is no lubrication present?
What is the purpose of a thrust collar in relation to a screw jack?
What is the purpose of a thrust collar in relation to a screw jack?
How does the total torque required to rotate a screw change when an effort P1 is applied at the end of a lever?
How does the total torque required to rotate a screw change when an effort P1 is applied at the end of a lever?
What force does a screw jack leverage to lift or lower a load?
What force does a screw jack leverage to lift or lower a load?
How does friction change between a screw and nut when using a V-thread instead of a square threaded screw?
How does friction change between a screw and nut when using a V-thread instead of a square threaded screw?
What is the role of the frictional force F in relation to the shaft rotation?
What is the role of the frictional force F in relation to the shaft rotation?
What must be true for the resultant force acting on the shaft for uniform motion?
What must be true for the resultant force acting on the shaft for uniform motion?
In terms of resultant turning moment on the shaft, what condition is necessary for uniform motion?
In terms of resultant turning moment on the shaft, what condition is necessary for uniform motion?
What is the relationship between T (frictional torque) and ø according to the provided text?
What is the relationship between T (frictional torque) and ø according to the provided text?
What is used to take the axial thrust of rotating shafts like those in ships and turbines?
What is used to take the axial thrust of rotating shafts like those in ships and turbines?
What condition is assumed in the study of bearing friction as per the text?
What condition is assumed in the study of bearing friction as per the text?
When a vertical shaft rotates in a flat pivot bearing, where does the sliding friction occur?
When a vertical shaft rotates in a flat pivot bearing, where does the sliding friction occur?
'Truncated or trapezoidal pivot' terminology refers to what kind of pivot?
'Truncated or trapezoidal pivot' terminology refers to what kind of pivot?
'Foot step bearing' terminology commonly refers to which type of pivot bearing?
'Foot step bearing' terminology commonly refers to which type of pivot bearing?
What is considered when there is uniform pressure in a flat pivot bearing?
What is considered when there is uniform pressure in a flat pivot bearing?
What is another name for collar bearings?
What is another name for collar bearings?
In the context of collar bearings, what does the symbol r1 represent?
In the context of collar bearings, what does the symbol r1 represent?
What does the coefficient of friction of 0.12 refer to in the context of collar bearings?
What does the coefficient of friction of 0.12 refer to in the context of collar bearings?
When considering uniform wear in collar bearings, what does the total load transmitted to the collar represent?
When considering uniform wear in collar bearings, what does the total load transmitted to the collar represent?
What does the symbol d1 = 600 mm or r1 = 300 mm represent in Example 1?
What does the symbol d1 = 600 mm or r1 = 300 mm represent in Example 1?
What does the intensity of pressure of 0.35 N/mm2 refer to in Example 2?
What does the intensity of pressure of 0.35 N/mm2 refer to in Example 2?
What is the assumption made about the rate of wear in bearings?
What is the assumption made about the rate of wear in bearings?
What is the formula for power lost in friction given the coefficient of friction and load?
What is the formula for power lost in friction given the coefficient of friction and load?
In the context of bearings, what does 'dl' represent?
In the context of bearings, what does 'dl' represent?
What does 'C/r' represent in the context of uniform wear in bearings?
What does 'C/r' represent in the context of uniform wear in bearings?
What is the formula for total torque acting on a conical pivot bearing?
What is the formula for total torque acting on a conical pivot bearing?
In a frustum bearing, what does '2pC.dr' represent?
In a frustum bearing, what does '2pC.dr' represent?
What does '301.76' represent in calculating the power absorbed in friction?
What does '301.76' represent in calculating the power absorbed in friction?
How is 'dl' related to 'dr' in bearing calculations?
How is 'dl' related to 'dr' in bearing calculations?
What information does 'pn × 2pr.drcosec a' provide?
What information does 'pn × 2pr.drcosec a' provide?
