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Engineering Mechanics

Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 - m
1 + m
1 / m
m

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Engineering Mechanics
When a body falls freely under gravitational force, it possesses __________ weight.

Minimum
None of these
No
Maximum

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Engineering Mechanics
Static friction is always __________ dynamic friction.

Greater than
None of these
Equal to
Less than

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

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

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

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

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Engineering Mechanics
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is

2mr²/3
mr²/3
3mr²/5
2mr²/5

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