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Engineering Mechanics

Engineering Mechanics
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

Second
First
None of these
Third

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Engineering Mechanics
The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted, and C = Another constant which represents the machine friction.)

P = m/W + C
P = C - mW
P = mW + C
P = mW - C

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Engineering Mechanics
Which of the following is an equation of linear motion?(where, u and v = Initial and final velocity of the body, a = Acceleration of the body, and s = Displacement of the body in time t seconds.)

All of these
v2 = u2 + 2a.s
s = u.t + ½ a.t2
v = u + a.t

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Engineering Mechanics
The resultant of two equal forces ‘P’ making an angle ‘θ’, is given by

2P tanθ/2
2P cotθ/2
2P cosθ/2
2P sinθ/2

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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 transmissibility of forces
Principle of resolution of forces
Principle of independence of forces

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Engineering Mechanics
The resultant of two forces P and Q (such that P > Q) acting along the same straight line, but in opposite direction, is given by

P + Q
P - Q
Q / P
P / Q

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