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Engineering Mechanics

Engineering Mechanics
The rate of change of displacement of a body is called

Velocity
Momentum
None of these
Acceleration

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Engineering Mechanics
One kg force is equal to

7.8 N
9.8 N
8.9 N
12 N

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Engineering Mechanics
The horizontal range of a projectile (R) is given by

R = u² cos2α/g
R = u² sin2α/g
R = u² sinα/g
R = u² cosα/g

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Engineering Mechanics
The maximum efficiency of a lifting machine is

m/V.R.
1/m
V.R./m
1/(m × V.R.)

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Engineering Mechanics
For a self locking machine, the efficiency must be

Greater than 50%
1
Less than 50%
Equal to 50%

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Engineering Mechanics
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

None of these
Principle of independence of forces
Principle of transmissibility of forces
Principle of resolution of forces

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