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Engineering Mechanics

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

20 cm4
16 cm4
12 cm4
9 cm4

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Engineering Mechanics
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)

π/ω
2π × ω
ω/2π
2π/ω

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Engineering Mechanics
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

Newton's first law of motion
None of these
Newton's second law of motion
Newton's third law of motion

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Engineering Mechanics
A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

1 m
2 m
4 m
3 m

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Engineering Mechanics
The forces, whose lines of action are parallel to each other and act in the same directions, are known as

Unlike parallel forces
Coplanar non-concurrent forces
Like parallel forces
Coplanar concurrent forces

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Engineering Mechanics
The time of flight (t) of a projectile on a horizontal plane is given by

t = 2u. cosα/g
t = 2u. sinα/g
t = 2u/g.sinα
t = 2u. tanα/g

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