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- Question
Moment of inertia of a hollow rectangular section as shown in the below figure about Y-Y axis, is not the same as that about X-X axis.
Options- A. Yes
- B. No
- Correct Answer
- Yes
- 1. If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys
Options- A. first
- B. second
- C. third Discuss
- 2. Vectors method for the resultant force is also called polygon law of forces.
Options- A. Correct
- B. Incorrect Discuss
- 3. A body of mass m moving with a constant velocity v strikes another body of same mass m moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is
Options- A. v
- B. 2v
- C. 4v
- D. 8v Discuss
- 4. A machine which is capable of doing work in the reversed direction, after the effort is removed, is called a non-reversible machine.
Options- A. Yes
- B. No Discuss
- 5. Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to
Options- A. area of the triangle
- B. twice the area of the triangle
- C. half the area of the triangle
- D. none of these Discuss
- 6. The centre of gravity of a triangle lies at a point where its medians intersect each other.
Options- A. True
- B. False Discuss
- 7. One joule means that
Options- A. work is done by a force of 1 N when it displaces a body through 1m
- B. work is done by a force of 1 kg when it displaces a body through 1 m
- C. work is done by a force of 1 dyne when it displaces a body through 1 cm
- D. work is done by a force of 1 g when it displaces a body through 1 cm Discuss
- 8. When a train is rounding a curve, the side thrust on the wheel flanges is prevented by raising the outer edge of the rail.
Options- A. Yes
- B. No Discuss
- 9. The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (?) is
Options- A. ?/2
- B. 30° + ?/2
- C. 45° + ?/2
- D. 60° + ?/2 Discuss
- 10. 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
Engineering Mechanics problems
Search Results
Correct Answer: second
Correct Answer: Correct
Correct Answer: 2v
Correct Answer: No
Correct Answer: twice the area of the triangle
Correct Answer: True
Correct Answer: work is done by a force of 1 N when it displaces a body through 1m
Correct Answer: Yes
Correct Answer: 45° + ?/2
Correct Answer: weight
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