1 A block (A) weighing 1 kN rests on a rough inclined plane whose inclina-tion to the horizontal is 45°. This block is connected to another block (B) weighing 3 kN rests on arough horizontal plane by a weightless rigid bar inclined at an angle of 30° to the horizontal asshown in Fig. 8.21.1 kNA 303 kNFig. 8.21.Match each item to a choice:Find horizontal force(P) required to beapplied to the block(B) just to move theblock (A) in upwarddirection. Assumeangle of limitingfriction as 15° at allsurface where thereis sliding.Choices:E 1.6kN: 1.4kN: 1.2kN: 1.8kN: 2.0kN

Draw the FBD for the given question and write the given values along with suitable variables.

A block (A) weighing 1 kN rests on a rough inclined plane whose inclina- tion to the horizontal is 45°. This block is connected to another block (B) weighing 3 kN rests on a rough horizontal plane by a weightless rigid bar inclined at an angle of 30° to the horizontal as shown in Fig. 8.21. 1 kN A 30° 3 kN B Fig. 8.21. Match each item to a choice: Find horizontal force (P) required to be applied to the block (B) just to move the block (A) in upward direction. Assume angle of limiting friction as 15° at all surface where there is sliding. Choices: : 1.6kN : 1.4kN : 1.2kN 1.8kN E 2.0kN :::

A block (A) weighing 1 kN rests on a rough inclined plane whose inclina- tion to the horizontal is 45°. This block is connected to another block (B) weighing 3 kN rests on a rough horizontal plane by a weightless rigid bar inclined at an angle of 30° to the horizontal as shown in Fig. 8.21. 1 kN A 30° 3 kN B Fig. 8.21. Match each item to a choice: Find horizontal force (P) required to be applied to the block (B) just to move the block (A) in upward direction. Assume angle of limiting friction as 15° at all surface where there is sliding. Choices: : 1.6kN : 1.4kN : 1.2kN 1.8kN E 2.0kN :::

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

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