How to practice concept:equilibrium

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–5 of 5. Imported answers require independent review unless marked reviewed.

Topic practice 5 questionsPage 1 of 1

Question 27

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MEMCQ1 markNeeds review
A rigid massless tetrahedron is placed such that vertex O is at the origin and the other three vertices A, B, and C lie on the coordinate axes as shown in the figure. The body is acted on by three point loads, of which one is acting at A along x-axis and another at point B along y-axis. For the body to be in equilibrium, the third point load acting at point O must be
Diagram for Mechanical Engineering question 27

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Question 58

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MENAT2 marksNeeds review
A three-hinge arch ABC in the form of a semi-circle is shown in the figure. The arch is in static equilibrium under vertical loads of

kN and

kN. Neglect friction at all the hinges. The magnitude of the horizontal reaction at B is ______ kN (rounded off to 1 decimal place).
Diagram for Mechanical Engineering question 58


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Question 26

Open question
MEMSQ1 markNeeds review
A square plate is supported in four different ways (configurations (P) to (S) as shown in the figure). A couple moment

is applied on the plate. Assume all the members to be rigid and mass-less, and all joints to be frictionless. All support links of the plate are identical.
Diagram for Mechanical Engineering question 26

The square plate can remain in equilibrium in its initial state for which one or more of the following support configurations?
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Question 50

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MENAT2 marksNeeds review
Two rigid massless rods PR and RQ are joined at frictionless pin-joint R and are resting on ground at P and Q, respectively, as shown in the figure. A vertical force

acts on the pin R as shown. When the included angle

, the rods remain in static equilibrium due to Coulomb friction between the rods and ground at locations P and Q. At

, impending slip occurs simultaneously at points P and Q. Then the ratio of the coefficient of friction at Q to that at P (

) is _________ (round off to two decimal places).
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Question 41

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MENAT2 marksNeeds review
A slider crank mechanism is shown in the figure. At some instant, the crank angle is 45° and a force of 40 N is acting towards the left on the slider. The length of the crank is 30 mm and the connecting rod is 70 mm. Ignoring the effect of gravity, friction and inertial forces, the magnitude of the crankshaft torque (in Nm) needed to keep the mechanism in equilibrium is __________ (correct to two decimal places).
Diagram for Mechanical Engineering question 41


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