Engineering Mechanics problems
- 1. Which of the following statement is correct?
Options- A. The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation,
- B. The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity.
- C. The velocity of the particle moving with simple harmonic motion is zero at the mean position.
- D. The acceleration of the particle moving with simple harmonic motion is maximum at the mean position. Discuss
Correct Answer: The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation,
- 2. The centre of percussion is below the centre of gravity of the body and is at a distance equal to
Options- A. h/kG
- B. h2/kG
- C. kG2/h
- D. h x kG Discuss
Correct Answer: kG2/h
- 3. The centre of gravity of a quadrant of a circle lies along its central radius (r) at a distance of
Options- A. 0.5r
- B. 0.6r
- C. 0.7r
- D. 0.8r Discuss
Correct Answer: 0.6r
- 4. If a number of coplaner forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.
Options- A. equal to
- B. less than
- C. greater than Discuss
Correct Answer: equal to
- 5. The velocity of a body on reaching the ground from a height h, is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 6. The term 'centroid' is
Options- A. the same as centre of gravity
- B. the point of suspension
- C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
- D. none of the above Discuss
Correct Answer: the same as centre of gravity
- 7. The unit of energy in S.I. units is
Options- A. dyne
- B. watt
- C. kg-m
- D. joule Discuss
Correct Answer: joule
- 8. If a body is acted upon by a number of coplaner non-concurrent forces, it may
Options- A. rotate about itself without moving
- B. move in any one direction rotating about itself
- C. be completely at rest
- D. all of these Discuss
Correct Answer: all of these
- 9. In order to completely specify angular displacement by a vector, it must fix
Options- A. direction of the axis of rotation
- B. magnitude of angular displacement
- C. sense of angular displacement
- D. all of these Discuss
Correct Answer: all of these
- 10. The angle which the normal reaction makes with the resultant reaction is called angle of friction.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
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