Discussion
An elevator with a hinge moment of \( -450 \ \mathrm{N\,m} \) is connected through a gearing that gives \( 0.10 \) metres of surface arc per newton metre. If the effective gearing yields a stick force of \( 45 \ \mathrm{N} \), doubling the speed would give about
Answer: B
Hinge moment goes with dynamic pressure and therefore with the square of speed, so doubling the speed quadruples the force:
\[ F = 45 \times 2^{2} = 180 \ \mathrm{N} \]
which is at the edge of what a pilot can hold one-handed for any length of time, and precisely why manual controls run out of acceptability as speed rises. 90 N assumes a linear dependence on speed. 45 N assumes none at all. 22 N has the trend backwards.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development