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

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

Surface contact

None of these

Body contact

Line or point contact

Surface contact

None of these

Body contact

Line or point contact

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Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

n₁ + n₂

n₁ + n₂ + 1

n₁ + n₂ - 2

n₁ + n₂ - 1

n₁ + n₂

n₁ + n₂ + 1

n₁ + n₂ - 2

n₁ + n₂ - 1

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Theory of Machine
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if

The center of gravity of the two masses coincides with that of the body

The sum of the two masses is equal to the total mass of body

The sum of mass moment of inertia of the masses about their center of gravity is equal to the mass moment of inertia of the body

All of these

The center of gravity of the two masses coincides with that of the body

The sum of the two masses is equal to the total mass of body

The sum of mass moment of inertia of the masses about their center of gravity is equal to the mass moment of inertia of the body

All of these

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Theory of Machine
Open pairs are those which have

Two elements that permit relative motion

Surface contact between the two elements when in motion

Elements of pairs not held together mechanically

Point or line contact between the two elements when in motion

Two elements that permit relative motion

Surface contact between the two elements when in motion

Elements of pairs not held together mechanically

Point or line contact between the two elements when in motion

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Theory of Machine
The magnitude of velocities of the points on a rigid link is

Inversely proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Inversely proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

Directly proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center

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Theory of Machine
The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r (sin 2θ/n)

m.ω².r cosθ

m.ω².r (cos 2θ/n)

m.ω².r sinθ

m.ω².r (sin 2θ/n)

m.ω².r cosθ

m.ω².r (cos 2θ/n)

m.ω².r sinθ

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Theory of Machine

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

Theory of Machine In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

Theory of Machine A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if

Theory of Machine Open pairs are those which have

Theory of Machine The magnitude of velocities of the points on a rigid link is

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

Theory of Machine
In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of discs on the driven shaft, then the number of pairs of contact surfaces will be

Theory of Machine
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if

Theory of Machine
Open pairs are those which have

Theory of Machine
The magnitude of velocities of the points on a rigid link is