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Engineering Mechanics

Engineering Mechanics
Moment of inertia of a circular section about its diameter (d) is

πd4/32
πd3/16
πd3/32
πd4/64

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Engineering Mechanics
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

v
v/4
v/2
v/8

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Engineering Mechanics
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span

2.5 cm
4.0 cm
5.0 cm
3.0 cm

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Engineering Mechanics
The maximum height of a projectile on a horizontal plane, is

u² sin²α/g
u² sin²α/2g
u² cos²α/g
u² cos²α/2g

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Engineering Mechanics
A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of

r/2
r/A
r/3
0.134 r

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Engineering Mechanics
The centre of gravity of a uniform lamina lies at

The centre of heavy portion
All of these
The midpoint of its axis
The bottom surface

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