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Engineering Mechanics

Engineering Mechanics
The ratio of static friction to dynamic friction is always

None of these
Greater than one
Less than one
Equal to one

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Engineering Mechanics
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

2n
2n - 1
n
n²

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Engineering Mechanics
The centre of gravity a T-section 100 mm × 150 mm × 50 mm from its bottom is

75 mm
50 mm
87.5 mm
125 mm

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Engineering Mechanics
The power developed by a body acted upon by a torque 'T' Newton meter (N - m) and revolving at ω radian/s is given by

T.ω/60 (in watts)
T.ω/75 (in kilowatts)
T.ω (in watts)
T.ω/4500 (in kilowatts)

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Engineering Mechanics
One kg force is equal to

9.8 N
8.9 N
12 N
7.8 N

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Engineering Mechanics
The forces, which meet at one point and their lines of action also lie on the same plane, are known as

Non-coplanar concurrent forces
Coplanar concurrent forces
Coplanar non-concurrent forces
Non-coplanar non-concurrent forces

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