# If rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

1.  more inclined when moving

2.  less inclined when moving

3.  more inclined when standing

4.  less inclined when standing

4

less inclined when standing

Explanation :
No Explanation available for this question

# Limiting force of friction is the

1.  tangent of angle between normal reaction and the resultant of normal reaction and limiting friction

2.  ratio of limiting friction and normal reaction

3.  the friction force acting when the body is just about to move

4.   the friction force acting when the body is in motion

4

the friction force acting when the body is just about to move

Explanation :
No Explanation available for this question

# Coulomb friction is the friction between

1.  bodies having relative motion

2.  two dry surfaces

3.  two lubricated surfaces

4.  solids and liquids

4

bodies having relative motion

Explanation :
No Explanation available for this question

# The tendency of a liquid surface to contract is due to the following property

1.  cohesion

3.  viscosity

4.  surface tension

4

surface tension

Explanation :
No Explanation available for this question

# The surface tension of mercury at normal temperature compared to that of water is

1.  more

2.  less

3.  same

4.  more or less depending on size of glass tube

4

more

Explanation :
No Explanation available for this question

# A perfect gas

1.  has constant viscosity

2.  has zero viscosity

3.  is incompressible

4.  none of the above

4

none of the above

Explanation :
No Explanation available for this question

# For very great pressures, viscosity of moss gases and liquids

1.  remains same

2.  increases

3.  decreases

4.  shows erratic behavior

4

shows erratic behavior

Explanation :
No Explanation available for this question

# A fluid in equilibrium can't sustain

1.  tensile stress

2.  compressive stress

3.  shear stress

4.  bending stress

4

shear stress

Explanation :
No Explanation available for this question

# Dynamic friction as compared to static friction is

1.  same

2.  more

3.  less

4.  may be less of more depending on nature of surfaces and velocity

4

less

Explanation :
No Explanation available for this question

1.  10m/sec2

2.  9.81 m/sec2

3.  10.2/m sec

4.  9.75 m/sec2

4