Under what motion conditions does the Coriolis component of acceleration exist________________?
Show answer Hide answer
Answer: B. rotational motion
Explanation
Coriolis acceleration occurs exclusively when a point slides across a rotating reference frame. The combination of rotational velocity and linear sliding velocity generates this vector component. Without simultaneous rotation and sliding, the mathematical Coriolis acceleration term equals zero. Kinematic acceleration analysis divides total motion into normal, tangential, and Coriolis parts. French engineer Gaspard-Gustave de Coriolis mathematically described this apparent force in physics. The magnitude equals two times the product of angular velocity and linear sliding speed.
Quick-return mechanisms in shapers and radial engine linkages experience significant Coriolis acceleration. Mechanical engineers must account for Coriolis forces when designing high-speed rotating slider systems. Meteorology also applies Coriolis principles to large-scale atmospheric wind patterns on Earth. Pure linear displacement lacks the necessary rotational component to create Coriolis effects. Pure rotation without internal sliding motion produces centripetal and tangential accelerations only. Stating none of the above is wrong because rotational motion combined with sliding is required.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What type of kinematic pair is formed by a crosshead and its guide rails_________________?
Show answer Hide answer
Answer: E. sliding pair
A crosshead sliding along fixed parallel guide rails forms a classic sliding kinematic pair. Sliding pairs are classified as lower kinematic pairs because they feature surface contact between mating elements. This joint...
Q2. Which theoretical heat engine cycle possesses the maximum possible thermal efficiency________________?
Show answer Hide answer
Answer: E. 4-stroke C.I. engine
The compression ignition cycle allows significantly higher compression ratios than spark ignition engines. Higher compression ratios directly translate to improved thermodynamic efficiency according to cycle equations. D...
Q3. How are cylindrical cams categorized based on their design configurations_________________?
Show answer Hide answer
Answer: E. none of the above
Cylindrical cams are classified by groove geometry rather than circular or tangent profile types. Standard surface classifications like circular or tangent do not apply to cylindrical groove layouts. Therefore, none of t...
Q4. What is the purpose of providing a crowned profile on pulleys__________________?
Show answer Hide answer
Answer: C. for automatic adjustment of belt posi-tion so that belt runs centrally
A crowned pulley profile features a slightly larger radius at its center than at its outer edges. This convex shape causes a flat belt to automatically center itself on the pulley due to lateral tracking forces. As the b...
Q5. How are higher pairs characterized in terms of element contact_________________?
Show answer Hide answer
Answer: A. point or line contact between the two elements when in motion
Higher pairs feature point or line contact to transmit forces between mating kinematic elements. This specific contact geometry distinguishes higher pairs from mechanisms sharing broad surface areas. The concentrated con...
Q6. What is the primary function of an idler pulley in belt drives___________________?
Show answer Hide answer
Answer: B. for applying tension
An idler pulley is primarily used in belt drive systems to adjust proper belt tension. Maintaining correct tension prevents unwanted belt slip during power transmission operations. Idlers can also increase the wrap angle...