64
Which of the following statements about static friction is correct? It
- A. is independent of the nature of the surface in contact
- B. depends on the area of surface in contact
- C. depends on the relative motion between the surface in contact
- D. depends on the weight of the moving body
65
The types of motion which a cylindrical drum rolling down an inclined plane undergoes are
- A. circular and translational
- B. rotational and translational
- C. rotational and circular
- D. rectilinear and circular
66
What is the density of a fuel of relative density 0.72? [Density of water = 1000kg m-3]
- A. 72 kgm-3
- B. 720 kgm-3
- C. 7200 kgm-3
- D. 72000 kgm-3
67
Which of the following instruments is best for measuring the diameter of a thin constantan wire?
- A. callipers
- B. metre rule
- C. micometer screw guage
- D. vernier callipers
68
Which of the following properties of a long steel bar would alter if the bar were melted, recast into a cube and allowed to cool to its original temperature?
- A. sensity
- B. volume
- C. specific heat capacity
- D. electrical resistance