Mechanical Engineering - Engineering Mechanics

1. 

When a body of mass moment of inertia I (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is

A. Iω
B. Iω2
C. 0.5Iω
D. 0.5Iω2

Answer: Option D

Explanation:

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2. 

The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

A. 20N
B. 100N
C. 500N
D. none of these

Answer: Option C

Explanation:

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3. 

The motion of the body from one extremity to the other is known as a beat.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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4. 

The centre of gravity of a rectangle lies at a point where its two diagonals meet each other.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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5. 

A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.

A. equal to
B. less than
C. greater than
D. either (b) or (c)

Answer: Option A

Explanation:

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