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)

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.r

(ω₁ - ω₂)2r

(ω₁ - ω₂)r

(ω₁ + ω₂)r

ω₁.ω₂.r

(ω₁ - ω₂)2r

(ω₁ - ω₂)r

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Theory of Machine
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Turning pair

Spherical pair

Sliding pair

Screw pair

Turning pair

Spherical pair

Sliding pair

Screw pair

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Theory of Machine
The secondary unbalanced force is __________ the primary unbalanced force.

Two-third

1/n times

n times

One-half

Two-third

1/n times

n times

One-half

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Theory of Machine
When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Surface contact

Body contact

Line or point contact

None of these

Surface contact

Body contact

Line or point contact

None of these

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Theory of Machine
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels

The Ackerman steering gear is most economical

Both (A) and (B)

The Ackerman steering gear consists of turning pairs

Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels

The Ackerman steering gear is most economical

Both (A) and (B)

The Ackerman steering gear consists of turning pairs

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Theory of Machine
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Wilson Hartnell governor

Pickering governor

Inertia governor

Hartung governor

Wilson Hartnell governor

Pickering governor

Inertia governor

Hartung governor

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Theory of Machine

Theory of Machine When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Theory of Machine The secondary unbalanced force is __________ the primary unbalanced force.

Theory of Machine When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Theory of Machine The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

Theory of Machine In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed

Theory of Machine
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a

Theory of Machine
The secondary unbalanced force is __________ the primary unbalanced force.

Theory of Machine
When the two elements of a pair have __________ when in motion, it is said to a lower pair.

Theory of Machine
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

Theory of Machine
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed