On a velocity vector polygon, how is the relative velocity between two mechanism points represented________________?
Show answer Hide answer
Answer: A. joining the corresponding points
Explanation
On a velocity vector polygon, relative velocity is represented by joining corresponding points. Vector subtraction graphically connects the velocity tips of the two compared points. This geometric construction simplifies analyzing complex multi-link mechanism velocities. Velocity polygons use scaled vector drawings to determine speeds in mechanisms. Absolute velocities radiate from a common stationary pole point on the diagram. Relative velocities bridge the vector gap between moving component reference points.
Mechanical engineers use velocity polygons to troubleshoot linkages in dynamic machinery. Graphical kinematics provides visual insight into component speeds before building prototypes. Computer-aided engineering software now automates these vector calculations for rapid design. Option B incorrectly adds perpendicular constraints not required for vector joining. Option C is false because velocity data can easily be determined from polygon diagrams. Option D introduces arbitrary angle requirements that violate relative vector rules.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Which statement regarding instantaneous centers is incorrect____________________?
Show answer Hide answer
Answer: D. the double centre can be denoted either by 02 or Ol2, but proper selection should be made
Double centers in mechanism analysis represent coincident instantaneous centers for links in multi-loop chains. Standard notation uses two digits separated by a comma or written together like O_12 to denote specific cent...
Q2. Which branch of engineering mechanics deals with relative motion between machine parts______________?
Show answer Hide answer
Answer: E. kinematics
Kinematics is the specific branch of engineering mechanics that studies relative motion between machine parts. This field analyzes positions, velocities, and accelerations without considering the forces causing the motio...
Q3. Under what conditions are two mechanical systems considered dynamically equivalent____________________?
Show answer Hide answer
Answer: D. all of the above
Dynamically equivalent systems must produce identical inertial forces and moments during motion. Matching mass, center of gravity location, and mass moment of inertia satisfies equivalence criteria. This equivalence allo...
Q4. Which engineering discipline covers both the relative motion of machine parts and the forces acting on them__________________?
Show answer Hide answer
Answer: A. theory of machines
Theory of machines encompasses both kinematics, studying motion without forces, and kinetics, studying forces. This comprehensive engineering discipline bridges pure geometry of motion with dynamic force analysis in mach...
Q5. Which field of study focuses specifically on inertia forces resulting from combined mass and motion of machine components_______________?
Show answer Hide answer
Answer: D. kinetics
Kinetics is the specific field of study focusing on inertia forces resulting from combined mass and motion. Unlike kinematics, kinetics incorporates mass properties and applied forces to calculate dynamic system behavior...
Q6. Which of the following mechanism connections qualifies as a lower pair_______________?
Show answer Hide answer
Answer: D. A. and B. above
Ball and socket joints maintain spherical surface contact while piston-cylinder assemblies use cylindrical surface contact. Both connection types rely on broad surface contact areas to transmit loads between moving compo...