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Theory of Machine

Theory of Machine
In S.H.M., acceleration is proportional to

Rate of change of velocity
Displacement
All of these
Velocity

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Theory of Machine
The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be

To raise the bow and stern
To lower the bow and stern
To raise the stern and lower the bow
To raise the bow and lower the stern

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Theory of Machine
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)

(ω₁ - ω₂)r
(ω₁ - ω₂)2r
ω₁.ω₂.r
(ω₁ + ω₂)r

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Theory of Machine
The Coriolis component of acceleration depends upon

None of these
Velocity of slider
Angular velocity of the link
Both (A) and (B)

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Theory of Machine
The driving and driven shafts connected by a Hooke's joint will have equal speeds, if

sinθ = ± tanα
tanθ = ± cosα
cotθ = cosα
cosθ = sinα

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Theory of Machine
In an open pair, the two elements of a pair

Are not held together mechanically
Are kept in contact by the action of external forces, when in motion
Have a line or point contact when in motion
Have a surface contact when in motion

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