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Engineering-mechanics Questions Set 25:

Quiz Mode

Which of the following is not a condition for the equilibrium in a 3D system?

∑V=0

∑F_x=0

∑F_y=0

∑F_z=0

Solution:

What is the term used for dry friction in the belt?

Surface friction

Dry column friction

Column Friction

Coulomb Friction

Solution:

Which of Newton's laws derives the impulse-momentum principle?

Newton's 3rd law

Newton's 2nd law

Newton's 1st law

All of the above

Solution:

The general relation between the number of members (m) and the number of joints (j) for a perfect truss.

m = 2j - 5

m = 3j - 5

m = 2j - 3

m = 4j - 3

Solution:

For the design of ordinary machinery, the typical value of journal friction can be taken as

0.07 to 0.15

0.05 to 0.80

0.008 to 0.02

none of the mentioned

Solution:

The moment (M) of the force (F) acting on a body at a distance L from the axis of rotation is given by the expression:

M = FLsin(θ)

M = FLcos(θ)

M = F/Lsin(θ)

M = FLcos(θ)

Solution:

Two bodies, each of mass m, are moving with the same constant velocity v but in opposite directions. What is the common velocity of the bodies after they collide?

Solution:

According to the principle of virtual work, the work done on a rigid body or a system of rigid bodies in equilibrium for any virtual displacements compatible with the constraints on the system is:

zero

maximum

minimum

none of the above

Solution:

A series spring combination of two springs is attached to a block of mass M on one side and a wall on the other on a horizontal plane. The stiffness of the springs are 10 N/mm^2 and 20 N/mm^2, and the total extension of the combination is 15 mm. Find the energy stored in the spring combination.

863.50

1125.50

749.25

2250.25

Solution:

When a composite body is subjected to a distributed load, where will the external force act if also applied on the body?

The net force will act on the base of the loading horizontally.

The net load will not be formed as all the forces will be cancelled.

The net force will not necessarily act at the centroid. It depends on the combination of the distributed load and external forces.

The net force will act at the centroid of the structure only.

Engineering-mechanics Questions Set 25:

Which of the following is not a condition for the equilibrium in a 3D system?

Solution:

What is the term used for dry friction in the belt?

Solution:

Which of Newton's laws derives the impulse-momentum principle?

Solution:

The general relation between the number of members (m) and the number of joints (j) for a perfect truss.

Solution:

For the design of ordinary machinery, the typical value of journal friction can be taken as

Solution:

The moment (M) of the force (F) acting on a body at a distance L from the axis of rotation is given by the expression:

Solution:

Two bodies, each of mass m, are moving with the same constant velocity v but in opposite directions. What is the common velocity of the bodies after they collide?

Solution:

According to the principle of virtual work, the work done on a rigid body or a system of rigid bodies in equilibrium for any virtual displacements compatible with the constraints on the system is:

Solution:

A series spring combination of two springs is attached to a block of mass M on one side and a wall on the other on a horizontal plane. The stiffness of the springs are 10 N/mm^2 and 20 N/mm^2, and the total extension of the combination is 15 mm. Find the energy stored in the spring combination.

Solution:

When a composite body is subjected to a distributed load, where will the external force act if also applied on the body?

Solution:

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