Which of the following property of the instantaneous center is correct?

Theory of Machine
Which of the following property of the instantaneous center is correct?

The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.

A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.

All of these

The two rigid links have no linear velocity relative to each other at the instantaneous centre.

The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.

A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.

All of these

The two rigid links have no linear velocity relative to each other at the instantaneous centre.

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Theory of Machine
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

sin (θ + φ) + 1/ cos (θ - φ) + 1

cos (θ - φ) + 1/ sin (θ + φ) + 1

cos (θ + φ) + 1/ cos (θ - φ) + 1

cos (θ - φ) + 1/ cos (θ + φ) + 1

sin (θ + φ) + 1/ cos (θ - φ) + 1

cos (θ - φ) + 1/ sin (θ + φ) + 1

cos (θ + φ) + 1/ cos (θ - φ) + 1

cos (θ - φ) + 1/ cos (θ + φ) + 1

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Theory of Machine
In a four bar chain or quadric cycle chain

Each of the four pairs is a turning pair

Two are turning pairs and two are sliding pairs

One is a turning pair and three are sliding pairs

Three are turning pairs and one is a sliding pair

Each of the four pairs is a turning pair

Two are turning pairs and two are sliding pairs

One is a turning pair and three are sliding pairs

Three are turning pairs and one is a sliding pair

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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.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
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

P = W cos(α + φ)

P = W tan(α - φ)

P = W tan(φ - α)

P = W tan(α + φ)

P = W cos(α + φ)

P = W tan(α - φ)

P = W tan(φ - α)

P = W tan(α + φ)

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Theory of Machine
The minimum periodic time of a compound pendulum is

(1/2π). √(2kG/g)

2π. √(2kG/g)

(1/2π). √(kG/g)

2π. √(kG/g)

(1/2π). √(2kG/g)

2π. √(2kG/g)

(1/2π). √(kG/g)

2π. √(kG/g)

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Theory of Machine

Theory of Machine Which of the following property of the instantaneous center is correct?

Theory of Machine The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

Theory of Machine In a four bar chain or quadric cycle chain

Theory of Machine In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

Theory of Machine The minimum periodic time of a compound pendulum is

Theory of Machine
Which of the following property of the instantaneous center is correct?

Theory of Machine
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)

Theory of Machine
In a four bar chain or quadric cycle chain

Theory of Machine
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

Theory of Machine
The minimum periodic time of a compound pendulum is