Civil Engineering - Applied Mechanics

26. 

A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If r is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be

A.
B.
C.
D.

Answer: Option C

Explanation:

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27. 

A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg. The velocity of recoil of the gun, will be

A. 0.01 m/sec
B. 0.05 m/sec
C. 1.00 m/sec
D. 1.5 m/see.

Answer: Option B

Explanation:

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28. 

The tension in a cable supporting a lift

A. is more when the lift is moving downwards
B. is less when the lift is moving upwards
C. remains constant whether its moves downwards or upwards
D. is less when the lift is moving downwards.

Answer: Option D

Explanation:

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29. 

A satellite moves in its orbit around the earth due to

A. Gravitational force
B. Centripetal force
C. Centrifugal force
D. none of these.

Answer: Option B

Explanation:

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30. 

If g1 and g2 are the gravitational accelerations on two mountains A and B respectively, the weight of a body when transported from A to B will be multiplied by

A. g1
B. g2
C.
D.

Answer: Option D

Explanation:

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