1.
2013/2014 - COZ Block 2 - Problem 1
Part A
A tractor (which has a mass of 10000 ) is lifted using the cable system shown. Determine the force in cable AC
needed to lift the tractor.
Express your answer with the appropriate units.
ANSWER:
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2.
2013/2014 - COZ Block 2 - Problem 2
A pin at C and the rod AB support the jib crane, carrying a load.
Part A
Given that the mass of the load is 2.0 with its center of mass at G, determine the horizontal and vertical
components of reaction at the pin C, given that the tension in the link AB is 20.5 . Also determine the distance .
Enter your answers numerically (with the correct sign) separated by a comma.
ANSWER:
Part B
Determine the distance .
Enter your answer.
ANSWER:
, =
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Typesetting math: 100%
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3.
2013/2014 - COZ Block 2 - Problem 3
The circular door has a weight of 305 and a center of gravity at G.
Part A
Determine the x, y, z components of reaction at the hinge A in equilibrium. Set .
Enter the x, y, and z components of the force (with the correct sign) separated by commas.
ANSWER:
Part B
Determine the magnitude of the force acting along strut CB.
Express your answer with the appropriate units.
ANSWER:
, , =
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4.
2013/2014 - COZ Block 2 - Problem 4
The wheelbarrow and its contents have a mass of = 62 with a center of mass at . Determine the normal reaction
on the tire and the vertical force on each hand to hold it at = 30 . Take = 0.28 , = 0.49 , = 0.71 and =
0.11 .
Part A
Determine the reaction on the tire.
Express your answer to three significant figures and include the appropriate units.
ANSWER:
Part B
Determine the vertical force on each hand.
Express your answer to three significant figures and include the appropriate units.
ANSWER:
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5.
2013/2014 - COZ Block 2 - Problem 5
Member lies in the - plane. Take that = 100 and = 370 .
Part A
Determine the resultant couple moment of the two couples that act on the assembly.
Enter the , , and components of the resultant couple moment separated by commas.
ANSWER:
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6.
2013/2014 - COZ Block 2 - Problem 6
The three outer blocks each have a mass and are used to suspend the central block E with mass = 3.7 .
Part A
Determine the mass of the outer blocks, given that the sag for equilibrium of the system is 1.4 .
Express your answer with the appropriate units.
ANSWER:
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7.
2013/2014 - COZ Block 2 - Problem 7
Part A
The roller shown is pulled over a smooth step. If a force 580 is needed to do so, determine the mass of
the roller. Set = 54 .
Express your answer with the appropriate units.
ANSWER:
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