Applied Mechanics problems
- 1. To avoid bending action at the base of a pier,
Options- A. suspension and anchor cables are kept at the same level
- B. suspension and anchor cables are fixed to pier top
- C. suspension cable and anchor cables are attached to a saddle mounted on rollers on top of the pier
- D. none the these. Discuss
Correct Answer: suspension and anchor cables are fixed to pier top
- 2. The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
- 3. The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface
Options- A. uneven distribution of the gravitational field
- B. gravity of the sun and the moon
- C. aerodynamic forces
- D. none of these. Discuss
Correct Answer: none of these.
- 4. A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be
Options- A. 48 kg
- B. 60 kg
- C. 72 kg
- D. none of these. Discuss
Correct Answer: 48 kg
- 5. Lami's theroem states that
Options- A. three forces acting at a point are always in equilibrium
- B. if three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium
- C. three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two
- D. three coplaner forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two
- E. none of these. Discuss
Correct Answer: three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two
- 6. Which one of the following laws is not applicable to a simple pendulum?.
Options- A. The time period does not depend on its magnitude
- B. The time period is proportional to its length l
- C. The time period is proportional to l where l is length
- D. The time period is inversely proportional to g where g is the acceleration due to gravity. Discuss
Correct Answer: The time period is proportional to its length l
- 7. For the system of the loads shown in below figure, the time required for the 6.6 kg load to fall on the edge, is
Options- A. 1 sec.
- B. 2 sec.
- C. 3 sec.
- D. 4 sec.
- E. 5 sec. Discuss
Correct Answer: 3 sec.
- 8. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along
Options- A. the same line in the same sense
- B. the same line in opposite sense
- C. the perpendicular to both the lines
- D. none of these. Discuss
Correct Answer: the same line in opposite sense
- 9. The following is not a law of static friction :
Options- A. The force of friction always acts in a direction opposite to that in which the body tends to move
- B. The force of friction is dependent upon the area of contact
- C. The force of friction depends upon the roughness of the surface
- D. The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces. Discuss
Correct Answer: The force of friction always acts in a direction opposite to that in which the body tends to move
- 10. A Seconds pendulum executes
Options- A. 0.5 beat per second
- B. 1.0 beat per second
- C. 2.0 beats per second
- D. 2.5 beats per second
- E. 3 beats per second. Discuss
Correct Answer: 2.0 beats per second
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