Engineering Mechanics problems
- 1. The minimum force required to slide a body of weight W on a rough horizontal plane is
Options- A. W sin ?
- B. W cos ?
- C. W tan ?
- D. none of these Discuss
Correct Answer: W tan ?
- 2. The acceleration of a particle moving with simple harmonic motion, at any instant is given by
Options- A. ?.y
- B. ?2.y
- C. ?2 /y
- D. ?3.y Discuss
Correct Answer: ?2.y
- 3. The potential energy of a vertically raised body is __________ the kinetic energy of a vertically falling body.
Options- A. equal to
- B. less than
- C. greater than Discuss
Correct Answer: equal to
- 4. If three forces acting at a point are represented in magnitude and direction by the three sides of a triangle, taken in order, then the forces are in equilibrium.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 5. A machine having an efficiency less than 50%, is known as
Options- A. reversible machine
- B. non-reversible machine
- C. neither reversible nor non-reversible machine
- D. ideal machine Discuss
Correct Answer: non-reversible machine
- 6. The loss of kinetic energy during elastic impact is zero.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 7. Newton's second law motion __________ a relation between force and mass of a moving body.
Options- A. gives
- B. does not give Discuss
Correct Answer: gives
- 8. Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is
Options- A. bh3/4
- B. bh3/8
- C. bh3/ 12
- D. bh3/ 36 Discuss
Correct Answer: bh3/ 12
- 9. If a given force (or a given system of forces) acting on a body __________ the position of the body, but keeps it in equilibrium, then its effect is to produce internal stress in the body.
Options- A. change
- B. does not change Discuss
Correct Answer: does not change
- 10. If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and v2 are their velocities after impact, then coefficient of restitution is given by
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
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