Which of the following is a scalar quantity ?

Related Mcqs:

1. A quantity measured in the C.G.S system of units has dimensions M”2L3 T3/2. What numerical factor would be required to convert the quantity to SI units ?

   A. 1
   B. 100
   C. 1/100
   D. 1/10000

2. A quantity whose dimensions are M2L2 T3 could be the product of_________________?

   A. force and pressure
   B. mass and power
   C. energy and velocity
   D. force and velocity

3. Which of the following represents the state of neutral equilibrium ?

   A. a cube resting on one edge
   B. a smooth cylinder lying on a curved surface
   C. a smooth cylinder lying on a convex surface
   D. none of the above

4. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics ?

   A. howe truss
   B. king post truss
   C. fink truss
   D. warren truss

5. The following is in unstable equilibrium__________________?

   A. a uniform solid cone resting on a generator on a smooth horizontal plane
   B. a uniform solid cone resting on its base on a horizontal plane
   C. a solid cube resting on one edge
   D. a satellite encircling the earth

6. A solid sphere of mass M and radius R rolls down a plane inclined at 0 with the horizontal. The acceleration of sphere is_______________?

   A. (1/3) g sin0
   B. (2/5) g sin 0
   C. (3/7) g sin 0
   D. (5/7) g sin0

   where g is acceleration due to gravity

7. The dimensions of Gravitational Universal constant ‘G’ are______________?

   A. M-‘L2r2
   B. M-‘L3r2
   C. M-2L3T2
   D. M’L3T2

8. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is____________________?

   A. 2/3
   B. 1/5
   C. 3/5
   D. 1/3

9. A system of copianar forces is in equilibrium when___________________?

   A. force polygon closes
   B. funicular polygon closes
   C. both force polygon” and funicular polygon close
   D. all the forces are concurrent

10. The unit of rotational inertia of a body in C.G.S system is________________?

    A. cm4
    B. kg-cm2
    C. gm-cm2
    D. gm-cm3