Engineering Mechanics problems
- 1. The law of motion involved in the recoil of gun is
Options- A. Newton's first law of motion
- B. Newton's second law of motion
- C. Newton's third law of motion
- D. none of these Discuss
Correct Answer: Newton's third law of motion
- 2. The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle.
Options- A. True
- B. False Discuss
Correct Answer: False
- 3. A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie
Options- A. in the shaded area
- B. in the hole
- C. at O Discuss
Correct Answer: in the shaded area
- 4. Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its mid-point
Options- A. same as
- B. twice
- C. thrice
- D. four times Discuss
Correct Answer: four times
- 5. Frequency of vibrations means the number of cycles per second.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 6. If a pendulum is taken 1 km below the earth surface in a mine, it will __________ in time.
Options- A. gain
- B. loose Discuss
Correct Answer: gain
- 7. The moment of inertia of a square of side a about its base is a4/ 3.
Options- A. True
- B. False Discuss
Correct Answer: True
- 8. If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is
Options- A. g/2
- B. g/3
- C. g/4
- D. none of these Discuss
Correct Answer: none of these
- 9. Coplaner concurrent forces are those forces which
Options- A. meet at one point, but their lines of action do not lie on the same plane
- B. do not meet at one point and their lines of action do not lie on the same plane
- C. meet at one point and their lines of action also lie on the same plane
- D. do not meet at one point, but their lines of action lie on the same plane Discuss
Correct Answer: meet at one point and their lines of action also lie on the same plane
- 10. The loss of kinetic energy due to direct impact of two bodies __________ upon the value of coefficient of restitution.
Options- A. depends
- B. does not depend Discuss
Correct Answer: depends
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