Assignment 10
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Transcript of Assignment 10
Assignment 10 Key solutions
Chapter 6, Problem 86.
Determine the components of the reactions at A and E when a counterclockwise couple of magnitude 192 lbin. is applied to the frame (a) at B, (b) at D.
Chapter 6, Solution 86.
(a) FBD AC:
(b) FBD CE:
Note: CE is a two-force member
Note: AC is a two-force member
Chapter 6, Problem 89.
The 120-N load can be moved along the line of action shown and can be applied at A, D, or E. Determine the components of the reactions at B and F when the 120-N load is applied (a) at A, (b) at D, (c) at E.
Chapter 6, Solution 89.
(a) FBD ACF:
(b) FBD BCE:
Note: BC is a two-force member
Note ACF is a two-force member
(c) Moving the 120 N force from D to E does not affect the reactions. The answers are the same as in part (b).
Chapter 6, Problem 95.
Knowing that the pulley has a radius of 75 mm, determine the components of the reactions at A and B.
Chapter 6, Solution 95.
FBD Frame & pulley:
FBD AD:
From above
Chapter 6, Problem 100.
For the frame and loading shown, determine the components of the forces acting on member ABC at B and C.
Chapter 6, Solution 100.
FBD Frame:
FBD DE:
FBD ABC:
On ABC: ,
,
Chapter 6, Problem 106.
Knowing that P = 411 lb and Q = 0, determine for the frame and loading shown (a) the reaction at D, (b) the force in member BF.
Chapter 6, Solution 106.
\
FBD Frame:
FBD DF: Note that BF and CE are two-force members.
Solving:
, so (a) 18.18°
(b)
Chapter 6, Problem 118.
The shear shown is used to trim electronic-circuit-board laminates. Knowing that P = 400 N, determine (a) the vertical component of the force exerted on the shearing blade at D, (b) the reaction at C.
Chapter 6, Solution 118.
FBD ABC:
FBD Blade:
(a) Vertical component at
(b)
Chapter 6, Problem 122.
The control rod CE passes through a horizontal hole in the body of the toggle clamp shown. Determine (a) the force Q required to hold the clamp in equilibrium, (b) the corresponding force in link BD.
Chapter 6, Solution 122.
FBD ABC:
FBD CE:
(a)
(b)
Chapter 7, Problem 1.
For the frame and loading of Prob. 6.99, determine the internal forces at a point J located halfway between points B and E.
Chapter 7, Solution 1.
FBD FRAME:
FBD JEHDF:
Thus,
Chapter 7, Problem 5.
Determine the internal forces at point J of the structure shown.
Chapter 7, Solution 5.
FBD Frame:
FBD AJ:
Note: AB is a two-force member, so
(1)
From (1) above,
Chapter 7, Problem 6.
Determine the internal forces at point K of the structure shown.
Chapter 7, Solution 6.
FBD CD:Note: AB is a two-force member
FBD CK: