A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is

Applied Mechanics and Graphic Statics
A ladder of weight 'w' rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight 'w' is to walk to the top of it safely, is tan'1 x, where x is

1/3

1/4

3

4

1/3

1/4

3

4

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Applied Mechanics and Graphic Statics
A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be

10 m/sec

20 m/sec

15 m/sec

25 m/sec

10 m/sec

20 m/sec

15 m/sec

25 m/sec

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Applied Mechanics and Graphic Statics
The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

None of these

(b² + bc + c²)/3 (b + c)

(a² + ab + c²)/3 (a + c)

(a² + ab + b²)/3 (a + b)

None of these

(b² + bc + c²)/3 (b + c)

(a² + ab + c²)/3 (a + c)

(a² + ab + b²)/3 (a + b)

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Applied Mechanics and Graphic Statics
The apparent weight of a man in a moving lift is less than his real weight when it is going down with

Uniform speed

An acceleration

Linear momentum

Retardation

Uniform speed

An acceleration

Linear momentum

Retardation

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Applied Mechanics and Graphic Statics
A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is

120 N

80 N

100 N

60 N

120 N

80 N

100 N

60 N

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Applied Mechanics and Graphic Statics
A smooth cylinder lying on its convex surface remains

In stable equilibrium

Out of equilibrium

In neutral equilibrium

In unstable equilibrium

In stable equilibrium

Out of equilibrium

In neutral equilibrium

In unstable equilibrium

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Applied Mechanics and Graphic Statics

Applied Mechanics and Graphic Statics A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be

Applied Mechanics and Graphic Statics The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

Applied Mechanics and Graphic Statics The apparent weight of a man in a moving lift is less than his real weight when it is going down with

Applied Mechanics and Graphic Statics A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is

Applied Mechanics and Graphic Statics A smooth cylinder lying on its convex surface remains

Applied Mechanics and Graphic Statics
A 49 kg lady stands on a spring scale in an elevator. During the first 5 sec, starting from rest, the scale reads 69 kg. The velocity of the elevator will be

Applied Mechanics and Graphic Statics
The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

Applied Mechanics and Graphic Statics
The apparent weight of a man in a moving lift is less than his real weight when it is going down with

Applied Mechanics and Graphic Statics
A force P of 50 N and another force Q of unknown magnitude act at 90° to each other. They are balanced by a force of 130 N. The magnitude of Q is

Applied Mechanics and Graphic Statics
A smooth cylinder lying on its convex surface remains