When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r + R) cosφ]/2

[(r + R) sinφ]/2

[(r² + R²) cosφ]/2

[(r² + R²) sinφ]/2

[(r + R) cosφ]/2

[(r + R) sinφ]/2

[(r² + R²) cosφ]/2

[(r² + R²) sinφ]/2

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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 anticlockwise 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
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Equal to 2

Less than 2

Greater than 2

Equal to 1

Equal to 2

Less than 2

Greater than 2

Equal to 1

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Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Not sound

Data is not sufficient to determine same

Soundness would depend upon which link is kept fixed

Kinematically sound

Not sound

Data is not sufficient to determine same

Soundness would depend upon which link is kept fixed

Kinematically sound

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Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector

Is in phase

Leads by 90°

Leads by 180°

Lags by 90°

Is in phase

Leads by 90°

Leads by 180°

Lags by 90°

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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

(ω₁ - ω₂)r

(ω₁ - ω₂)2r

ω₁.ω₂.r

(ω₁ + ω₂)r

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Theory of Machine

Theory of Machine In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Theory of Machine A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Theory of Machine In a simple harmonic motion, the velocity vector with respect to displacement vector

Theory of Machine
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is

Theory of Machine
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector