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.r

(ω₁ - ω₂)2r

(ω₁ - ω₂)r

(ω₁ + ω₂)r

ω₁.ω₂.r

(ω₁ - ω₂)2r

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Theory of Machine
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is

5

4

3

2

5

4

3

2

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Theory of Machine
The contact ratio is given by

(Length of the arc of approach)/cosφ

(Length of the arc of contact)/(Circular pitch)

(Length of path of recess)/(Circular pitch)

(Length of the path of approach)/(Circular pitch)

(Length of the arc of approach)/cosφ

(Length of the arc of contact)/(Circular pitch)

(Length of path of recess)/(Circular pitch)

(Length of the path of approach)/(Circular pitch)

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Theory of Machine
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

ω² r {n/(n + 1)}

ω² r {n/(n - 1)}

ω² r {(n - 1)/n}

ω² r {(n + 1)/n}

ω² r {n/(n + 1)}

ω² r {n/(n - 1)}

ω² r {(n - 1)/n}

ω² r {(n + 1)/n}

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Theory of Machine
The Coriolis component of acceleration is taken into account for

Four bar chain mechanism

Slider crank mechanism

Quick return motion mechanism

All of these

Four bar chain mechanism

Slider crank mechanism

Quick return motion mechanism

All of these

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Theory of Machine
The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is

(2/3).μ W cosec α (r₁ + r₂)

(2/3). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]

(1/2). μ W cosec α (r₁ + r₂)

(1/2). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]

(2/3).μ W cosec α (r₁ + r₂)

(2/3). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]

(1/2). μ W cosec α (r₁ + r₂)

(1/2). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]

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Theory of Machine

Theory of Machine A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is

Theory of Machine The contact ratio is given by

Theory of Machine When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

Theory of Machine The Coriolis component of acceleration is taken into account for

Theory of Machine The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is

Theory of Machine
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is

Theory of Machine
The contact ratio is given by

Theory of Machine
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

Theory of Machine
The Coriolis component of acceleration is taken into account for

Theory of Machine
The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is