Wedge Sample Problem The two 20kN blocks are pushed apart by the 15⁰ wedge of negligible weight. The angle of static friction is 120 on all contact surfaces. Determine the force P required to start the blocks moving. P 20KN 150150 20kN R

Wedge Sample Problem The two 20kN blocks are pushed apart by the 15⁰ wedge of negligible weight. The angle of static friction is 120 on all contact surfaces. Determine the force P required to start the blocks moving. P 20KN 150150 20kN R

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 7.75P: The single-plate clutch transmits the torque C from the input shaft on the left to the output shaft...

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can u please answer and explain this

Wedge Sample Problem
. The two 20kN blocks are pushed apart by the 15⁰
wedge of negligible weight. The angle of static
friction is 12º on all contact surfaces. Determine
the force P required to start the blocks moving.
20kN
150150/
20KN
R₁
15⁰
12⁰
27⁰
15⁰ 15⁰
20KN
R₂
27⁰
R₁
ΣFy=
= 0 at wedge
2R₁ sin 27° P = 0
EFx = 0 at block
R₂ sin 12°-R₁ cos 27° = 0
ΣFy = = 0 at block
R₂ cos 12°
R₁ sin 27°
-20 = 0
R₁ = 5.22 kN
R₂ = 22.4 kN
P = 4.74 kN

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