Podcast
Questions and Answers
What is the purpose of dynamic force analysis?
What is the purpose of dynamic force analysis?
How is the inertia force defined?
How is the inertia force defined?
What is the relationship between inertia force and linear acceleration?
What is the relationship between inertia force and linear acceleration?
What does the inertia torque represent?
What does the inertia torque represent?
Signup and view all the answers
How can a system of forces acting on a rigid body be represented?
How can a system of forces acting on a rigid body be represented?
Signup and view all the answers
In what direction does the force passed through the center of gravity act?
In what direction does the force passed through the center of gravity act?
Signup and view all the answers
What is the term used to describe the curve traced by a particle while moving along a screw thread?
What is the term used to describe the curve traced by a particle while moving along a screw thread?
Signup and view all the answers
Which type of screw threads are mainly used for tightening pieces together like bolts and nuts?
Which type of screw threads are mainly used for tightening pieces together like bolts and nuts?
Signup and view all the answers
What is the relationship between pitch, lead, and number of threads in a single-threaded screw?
What is the relationship between pitch, lead, and number of threads in a single-threaded screw?
Signup and view all the answers
Which principle states that the resultant force acting on a body and the reversed effective force are in equilibrium?
Which principle states that the resultant force acting on a body and the reversed effective force are in equilibrium?
Signup and view all the answers
What is the inertia force described as in D-Alembert's Principle?
What is the inertia force described as in D-Alembert's Principle?
Signup and view all the answers
Which device works on a principle similar to that of an inclined plane for lifting heavy loads?
Which device works on a principle similar to that of an inclined plane for lifting heavy loads?
Signup and view all the answers
What is the product of mass and linear acceleration of the center of mass of a body according to D-Alembert's Principle?
What is the product of mass and linear acceleration of the center of mass of a body according to D-Alembert's Principle?
Signup and view all the answers
Which type of screw threads offer more frictional resistance and prevent nuts from slackening?
Which type of screw threads offer more frictional resistance and prevent nuts from slackening?
Signup and view all the answers
What is the slope or inclination of the thread with the horizontal known as?
What is the slope or inclination of the thread with the horizontal known as?
Signup and view all the answers
What does FI represent in D-Alembert's Principle?
What does FI represent in D-Alembert's Principle?
Signup and view all the answers
What is the total thrust from the propeller in Example 1?
What is the total thrust from the propeller in Example 1?
Signup and view all the answers
What is the torque required to lift a load by a screw jack if the pitch of the screw is represented by p, mean diameter by d, helix angle by a, effort applied at the circumference by P, load to be lifted by W, and coefficient of friction by µ?
What is the torque required to lift a load by a screw jack if the pitch of the screw is represented by p, mean diameter by d, helix angle by a, effort applied at the circumference by P, load to be lifted by W, and coefficient of friction by µ?
Signup and view all the answers
In Example 2, what power is absorbed when the shaft runs at 105 r.p.m. carrying a load of 150 kN under uniform pressure?
In Example 2, what power is absorbed when the shaft runs at 105 r.p.m. carrying a load of 150 kN under uniform pressure?
Signup and view all the answers
In the context of a square threaded screw, what is the normal reaction given the helix angle a?
In the context of a square threaded screw, what is the normal reaction given the helix angle a?
Signup and view all the answers
In the context of collar bearings, what is the external diameter of the collars in Example 1?
In the context of collar bearings, what is the external diameter of the collars in Example 1?
Signup and view all the answers
What is the total torque required to overcome friction in a turning pair if an effort P1 is applied at the end of a lever of arm length l?
What is the total torque required to overcome friction in a turning pair if an effort P1 is applied at the end of a lever of arm length l?
Signup and view all the answers
In a journal bearing, what forms a line contact when not lubricated?
In a journal bearing, what forms a line contact when not lubricated?
Signup and view all the answers
What does the coefficient of friction value of 0.12 represent in the context of collar bearings?
What does the coefficient of friction value of 0.12 represent in the context of collar bearings?
Signup and view all the answers
What angle is represented by 2 in the context of V-thread?
What angle is represented by 2 in the context of V-thread?
Signup and view all the answers
What does the variable 'n' represent in the given context of collar bearings examples?
What does the variable 'n' represent in the given context of collar bearings examples?
Signup and view all the answers
How is the speed of rotation (N) related to angular velocity (ω) in the provided text?
How is the speed of rotation (N) related to angular velocity (ω) in the provided text?
Signup and view all the answers
How is the normal reaction calculated for V-thread where the axial component must be equal to the axial load W?
How is the normal reaction calculated for V-thread where the axial component must be equal to the axial load W?
Signup and view all the answers
What is NOT true about the torque required to overcome friction between the screw and nut?
What is NOT true about the torque required to overcome friction between the screw and nut?
Signup and view all the answers
What happens to the reaction R in a journal bearing when lubricated?
What happens to the reaction R in a journal bearing when lubricated?
Signup and view all the answers
What is assumed to be proportional for the rate of wear in rubbing surfaces?
What is assumed to be proportional for the rate of wear in rubbing surfaces?
Signup and view all the answers
What is the formula for the vertical load acting on a small ring of radius r along a cone?
What is the formula for the vertical load acting on a small ring of radius r along a cone?
Signup and view all the answers
In the context of uniform wear, what is the relationship between the intensity of pressure and the distance from the central axis?
In the context of uniform wear, what is the relationship between the intensity of pressure and the distance from the central axis?
Signup and view all the answers
What is the formula for the total frictional torque acting on a conical pivot bearing?
What is the formula for the total frictional torque acting on a conical pivot bearing?
Signup and view all the answers
When using a trapezoidal or truncated conical pivot bearing, what is considered to be uniform?
When using a trapezoidal or truncated conical pivot bearing, what is considered to be uniform?
Signup and view all the answers
What is the total torque acting on a bearing obtained by integrating the value of $T_r$ within the limits between $r_1$ and $r_2$?
What is the total torque acting on a bearing obtained by integrating the value of $T_r$ within the limits between $r_1$ and $r_2$?
Signup and view all the answers
For a collar bearing, what is its primary function?
For a collar bearing, what is its primary function?
Signup and view all the answers
What is the coefficient of friction assumed in Example 1 concerning power lost in friction?
What is the coefficient of friction assumed in Example 1 concerning power lost in friction?
Signup and view all the answers
In Example 1, if the shaft diameter is given in millimeters, what is its equivalent value in meters?
In Example 1, if the shaft diameter is given in millimeters, what is its equivalent value in meters?
Signup and view all the answers
What is the total power absorbed in friction for the conical pivot bearing supporting a load of 20 kN with a cone angle of 120º?
What is the total power absorbed in friction for the conical pivot bearing supporting a load of 20 kN with a cone angle of 120º?
Signup and view all the answers
What is the coefficient of friction represented by in the given text?
What is the coefficient of friction represented by in the given text?
Signup and view all the answers
In the context provided, what does the angle ø represent?
In the context provided, what does the angle ø represent?
Signup and view all the answers
Which type of pivot may have a flat surface or conical surface?
Which type of pivot may have a flat surface or conical surface?
Signup and view all the answers
What type of bearing is typically used in modern practice for large thrusts, like in propeller shafts of ships?
What type of bearing is typically used in modern practice for large thrusts, like in propeller shafts of ships?
Signup and view all the answers
What parameter determines the rate of wear according to the given text?
What parameter determines the rate of wear according to the given text?
Signup and view all the answers
In the context provided, what is represented by T = W.rtanø?
In the context provided, what is represented by T = W.rtanø?
Signup and view all the answers
What does a truncated pivot represent?
What does a truncated pivot represent?
Signup and view all the answers
What does wear being uniform throughout the bearing surface imply?
What does wear being uniform throughout the bearing surface imply?
Signup and view all the answers