Mechanical Engineering - Engineering Mechanics

11. 

A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

A. towards the wall at its upper and
B. away from the wall at its upper end
C. downward at its upper end
D. upward at its upper end

Answer: Option D

Explanation:

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12. 

The length of a second's pendulum is

A. 94.9cm
B. 99.4cm
C. 100cm
D. 101cm

Answer: Option B

Explanation:

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13. 

The slope on the road surface generally provided on the curves is known as

A. angle of friction
B. angle of repose
C. angle of banking
D. none of these

Answer: Option C

Explanation:

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14. 

Coplaner non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

A. meet
B. do not meet

Answer: Option B

Explanation:

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15. 

The moment of inertia of a rectangular section 3cm wide and 4cm deep about X-X axis is

A. 9cm4
B. 12cm4
C. 16cm4
D. 20cm4

Answer: Option C

Explanation:

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