The maximum mechanical advantage of a lifting machine is

Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

1 + m

1 - m

m

1 / m

1 + m

1 - m

m

1 / m

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Engineering Mechanics
The static friction

Always acts in a direction, opposite to that in which the body tends to move

All of these

Is independent of the area of contact, between the two surfaces

Bears a constant ratio to the normal reaction between the two surfaces

Always acts in a direction, opposite to that in which the body tends to move

All of these

Is independent of the area of contact, between the two surfaces

Bears a constant ratio to the normal reaction between the two surfaces

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Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

200

400

100

50

200

400

100

50

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Engineering Mechanics
Which of the following are vector quantities?

Linear velocity

Linear acceleration

Linear displacement

All of these

Linear velocity

Linear acceleration

Linear displacement

All of these

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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 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 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 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 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 taken in order, then the forces are in equilibrium

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Engineering Mechanics
Angle of friction is the

The ratio of minimum friction force to friction force acting when the body is in motion

The ratio of minimum friction force to the friction force acting when the body is just about to move

Angle between normal reaction and the resultant of normal reaction and the limiting friction

Ratio of limiting friction and normal reaction

The ratio of minimum friction force to friction force acting when the body is in motion

The ratio of minimum friction force to the friction force acting when the body is just about to move

Angle between normal reaction and the resultant of normal reaction and the limiting friction

Ratio of limiting friction and normal reaction

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Engineering Mechanics

Engineering Mechanics The maximum mechanical advantage of a lifting machine is

Engineering Mechanics The static friction

Engineering Mechanics In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

Engineering Mechanics Which of the following are vector quantities?

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

Engineering Mechanics Angle of friction is the

Engineering Mechanics
The maximum mechanical advantage of a lifting machine is

Engineering Mechanics
The static friction

Engineering Mechanics
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is

Engineering Mechanics
Which of the following are vector quantities?

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

Engineering Mechanics
Angle of friction is the