Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

db³/12

bd³/12

db³/36

bd³/36

db³/12

bd³/12

db³/36

bd³/36

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Engineering Mechanics
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

v/8

v/2

v

v/4

v/8

v/2

v

v/4

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Engineering Mechanics
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

The change in momentum suffered by rubber ball is more than the lead ball

None of these

Both the balls undergo an equal change in momentum

The change in momentum suffered by rubber ball is less than the lead ball

The change in momentum suffered by rubber ball is more than the lead ball

None of these

Both the balls undergo an equal change in momentum

The change in momentum suffered by rubber ball is less than the lead ball

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Engineering Mechanics
An ideal machine is one whose efficiency is

1

Between 70 and 80%

Between 80 and 90%

Between 60 and 70 %

1

Between 70 and 80%

Between 80 and 90%

Between 60 and 70 %

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

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 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 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 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 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 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

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

Perpendicular to the wall at its upper end

Upward at its upper end

Downward at its upper end

Zero at its upper end

Perpendicular to the wall at its upper end

Upward at its upper end

Downward at its upper end

Zero at its upper end

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Engineering Mechanics

Engineering Mechanics Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Engineering Mechanics Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

Engineering Mechanics A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Engineering Mechanics An ideal machine is one whose efficiency is

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

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

Engineering Mechanics
Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

Engineering Mechanics
Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

Engineering Mechanics
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

Engineering Mechanics
An ideal machine is one whose efficiency is

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

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