Discussion
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- Question
In a screw jack, the effort required to lift the load is given by(where W = Load lifted, ? = Helix angle, and ? = Angle of friction.)
Options- A. P = W tan (? - ?)
- B. P = W tan (? + ?)
- C. P = W tan (? - ?)
- D. P = W cos (? + ?)
- Correct Answer
- P = W tan (? + ?)
- 1. The maximum height of a projectile on a horizontal plane, is
Options- A.
- B.
- C.
- D.
Discuss
- 2. An irregular body may have more than one centre of gravity.
Options- A. Yes
- B. No Discuss
- 3. The angle of inclination with the vertical is __________ if the cyclist is running at a faster speed than that when he is running at a slower speed.
Options- A. more
- B. less Discuss
- 4. When the spring of a watch is wound, it will possess
Options- A. strain energy
- B. kinetic energy
- C. heat energy
- D. electrical energy Discuss
- 5. In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.
Options- A. less than
- B. equal to
- C. more than Discuss
- 6. The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
Options- A. P = Q
- B. Q = R
- C. Q = 2R
- D. none of these Discuss
- 7. Whenever a force acts on a body and the body undergoes a displacement, then
Options- A. work is said to be done
- B. power is being transmitted
- C. body has kinetic energy of translation
- D. none of these Discuss
- 8. Moment of inertia of a circular section about its diameter (d) is
Options- A. ?d3/16
- B. ?d3/32
- C. ?d4/32
- D. ?d4/64 Discuss
- 9. When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.
Options- A. Correct
- B. Incorrect Discuss
- 10. The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of ? rad / s2, is
Options- A. a = ?/ r
- B. a = ?.r
- C. a = r / ?
- D. none of these Discuss
Engineering Mechanics problems
Search Results
Correct Answer:
Correct Answer: No
Correct Answer: more
Correct Answer: strain energy
Correct Answer: less than
Correct Answer: Q = R
Correct Answer: work is said to be done
Correct Answer: ?d4/64
Correct Answer: Incorrect
Correct Answer: a = ?.r
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