# The co-efficient of friction depends upon

1.  nature of surfaces

2.  area of contact

3.  shape of the surfaces

4.  all of the above

4

nature of surfaces

Explanation :
No Explanation available for this question

# A balloon lifting in air follows the following principle

1.  law of gravitation

2.  Archimedes principle

3.  principle of buoyancy

4.  all of the above

4

all of the above

Explanation :
No Explanation available for this question

# The necessary condition for forces to be in equilibrium is that these should be

1.  coplanar

2.  meet at one point

3.  both (a) and (b) above

4.  none of the above

4

both (a) and (b) above

Explanation :
No Explanation available for this question

# If three forces acting in different planes can be represented by a triangle, these will be in

1.  non-equilibrium

2.  partial equilibrium

3.  full equilibrium

4.  unpredictable

4

non-equilibrium

Explanation :
No Explanation available for this question

# The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to

1.  1000

2.  2100

3.  2700

4.  21,000

4

21,000

Explanation :
No Explanation available for this question

# A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly

1.  38 m

2.  62.5 m

3.  96 m

4.  124 m

4

62.5 m

Explanation :
No Explanation available for this question

# A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to

1.  25

2.  50

3.  100

4.  250

4

50

Explanation :
No Explanation available for this question

# Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

1.  ellipse

2.  hyperbola

3.  parabola

4.  circle

4

hyperbola

Explanation :
No Explanation available for this question

# The increase of temperature results in

1.  increase in viscosity of gas

2.  increase in viscosity of liquid

3.  decrease in viscosity of gas

4.  decrease in viscosity of liquid

4

decrease in viscosity of liquid

Explanation :
No Explanation available for this question

1.  kg m

2.  kcal

3.  watt

4.  watt hours

5.

5