The point, through which the whole weight of the body acts, irrespective of its position, is known as

Engineering Mechanics
The point, through which the whole weight of the body acts, irrespective of its position, is known as

Center of percussion

Center of gravity

Center of mass

Moment of inertia

Center of percussion

Center of gravity

Center of mass

Moment of inertia

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Ideal machine

Reversible machine

Non-reversible machine

Neither reversible nor non-reversible machine

Ideal machine

Reversible machine

Non-reversible machine

Neither reversible nor non-reversible machine

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Engineering Mechanics
Which is the correct statement about law of polygon of forces?

If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

If a polygon representing forces acting at a point is closed then forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium

If a polygon representing forces acting at a point is closed then forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

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Engineering Mechanics
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

None of these

Coplanar non-concurrent forces

Coplanar concurrent forces

Non-coplanar concurrent forces

None of these

Coplanar non-concurrent forces

Coplanar concurrent forces

Non-coplanar concurrent forces

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Engineering Mechanics
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

Away from the wall at its upper end

Upward at its upper end

Towards the wall at its upper end

Downward at its upper end

Away from the wall at its upper end

Upward at its upper end

Towards the wall at its upper end

Downward at its upper end

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Engineering Mechanics
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

Does not change

None of these

Change

Changes periodically

Does not change

None of these

Change

Changes periodically

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Engineering Mechanics

Engineering Mechanics The point, through which the whole weight of the body acts, irrespective of its position, is known as

Engineering Mechanics A machine having an efficiency greater than 50%, is known as

Engineering Mechanics Which is the correct statement about law of polygon of forces?

Engineering Mechanics The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

Engineering Mechanics A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

Engineering Mechanics If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.

Engineering Mechanics
The point, through which the whole weight of the body acts, irrespective of its position, is known as

Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Engineering Mechanics
Which is the correct statement about law of polygon of forces?

Engineering Mechanics
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

Engineering Mechanics
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

Engineering Mechanics
If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.