A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become

Theory of Machine
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become

16 tp

tp /16

tp /4

4 tp

16 tp

tp /16

tp /4

4 tp

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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 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(φ - α)

P = W tan(α + φ)

P = W tan(α - φ)

P = W cos(α + φ)

P = W tan(φ - α)

P = W tan(α + φ)

P = W tan(α - φ)

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Theory of Machine
The acceleration of the particle moving with simple harmonic motion is _________ at the mean position.

Maximum

Minimum

Zero

None of these

Maximum

Minimum

Zero

None of these

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Theory of Machine
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

α = 45° - φ/2

α = 90° + φ

α = 90° - φ

α = 45° + φ/2

α = 45° - φ/2

α = 90° + φ

α = 90° - φ

α = 45° + φ/2

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Theory of Machine
In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle θ, the angular velocity of the connecting rod is given by

ω sinθ/(n² - cos²θ)1/2

ω cosθ/(n² - sin²θ)1/2

ω cosθ/(n² - cos²θ)1/2

ω sinθ/(n² - sin²θ)1/2

ω sinθ/(n² - cos²θ)1/2

ω cosθ/(n² - sin²θ)1/2

ω cosθ/(n² - cos²θ)1/2

ω sinθ/(n² - sin²θ)1/2

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Theory of Machine

Theory of Machine A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become

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 acceleration of the particle moving with simple harmonic motion is _________ at the mean position.

Theory of Machine The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

Theory of Machine In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle θ, the angular velocity of the connecting rod is given by

Theory of Machine
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become

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 acceleration of the particle moving with simple harmonic motion is _________ at the mean position.

Theory of Machine
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)

Theory of Machine
In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle θ, the angular velocity of the connecting rod is given by