Mechanical Engineering - Engineering Mechanics

41. 

A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.

A. True
B. False

Answer: Option A

Explanation:

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42. 

When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as

A. simple pendulum
B. compound pendulum
C. torsional pendulum
D. second's pendulum

Answer: Option B

Explanation:

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43. 

Moment of inertia of a hollow circular section, as shown in the below figure about X-axis, is

A.
B.
C.
D.

Answer: Option D

Explanation:

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44. 

If two blocks of equal mass are attached to the two ends of a light string and one of the blocks is placed over a smooth horizontal plane while the other is hung freely after passing over a smooth pulley, then the two blocks will have some motion.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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45. 

During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.

A. equal to
B. equal and opposite to
C. less than
D. greater than

Answer: Option B

Explanation:

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