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- Question
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is
Options- A. mr2/3
- B. 2mr2/3
- C. 2mr2/5
- D. 3mr2/5
- Correct Answer
- 2mr2/3
- 1. According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)
Options- A. IP = IG + Ah2
- B. IP = IG - Ah2
- C. IP = IG / Ah2
- D. IP = Ah2 / IG Discuss
- 2. The velocity ratio of a first system of pulleys with 4 pulleys is
Options- A. 4
- B. 8
- C. 16
- D. 20 Discuss
- 3. Efficiency of a screw jack is given by(where ? = Helix angle, and ? = Angle of friction.)
Options- A.
- B.
- C.
- D.
Discuss
- 4. The velocity ratio for the second system of pulleys is n.
Options- A. True
- B. False Discuss
- 5. The force, by which the body is attracted, towards the centre of the earth, is called
Options- A. impulsive force
- B. mass
- C. weight
- D. momentum Discuss
- 6. The linear velocity of a body rotating at ? rad / s along a circular path of radius r is given by
Options- A. ?/r
- B. ?.r
- C. ?2/r
- D. ?2.r Discuss
- 7. The ideal angle of banking provided on the curves on roads depends upon
Options- A. weight of the vehicle
- B. (velocity)2 of the vehicle
- C. nature of the road surface
- D. coefficient of friction between the road and vehicle contact point Discuss
- 8. The time taken by a particle for one complete oscillation is known as periodic time.
Options- A. Agree
- B. Disagree Discuss
- 9. The power developed by a body acted upon by a torque T newton metre (N - m) and revolving at ? radian/s is given by
Options- A. T.? (in watts)
- B. T.?/60 (in watts)
- C. T.?/75 (in kilowatts)
- D. T.?/4500 (in kilowatts) Discuss
- 10. The moment of inertia of a thin disc of mass m and radius r, about an axis through its centre of gravity and perpendicular to the plane of the disc is
Options- A. mr2/2
- B. mr2/4
- C. mr2/6
- D. mr2/8 Discuss
Engineering Mechanics problems
Search Results
Correct Answer: IP = IG + Ah2
Correct Answer: 16
Correct Answer:
Correct Answer: True
Correct Answer: weight
Correct Answer: ?.r
Correct Answer: (velocity)2 of the vehicle
Correct Answer: Agree
Correct Answer: T.? (in watts)
Correct Answer: mr2/2
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