động tử
Definition
Noun (Physics):
- Mobile: A single, discrete particle or point of mass that is in motion or capable of motion. It is a fundamental concept for analyzing movement, forces, and energy in a system.
- Moving particle / point mass: An object whose motion is studied, often idealized as having mass but no size or internal structure for simplification in physics and mathematics problems.
Noun (Mathematics):
- Moving point: In geometry or calculus, a point that changes its position according to a defined rule, equation, or set of conditions. It is used to describe paths, trajectories, and loci.
Usage Examples
Noun (Physics):
- Trong cơ học, một động tử chuyển động dưới tác dụng của lực. (In mechanics, a mobile moves under the influence of a force.)
- Năng lượng của động tử được bảo toàn trong hệ kín. (The energy of the particle is conserved in a closed system.)
Noun (Mathematics):
- Đường cong được tạo ra bởi quỹ đạo của một động tử. (The curve is generated by the trajectory of a moving point.)
- Bài toán yêu cầu tìm vận tốc của động tử tại thời điểm t. (The problem requires finding the velocity of the moving point at time t.)
Advanced Usage
- "Động tử học" (kinematics): The branch of mechanics that describes the motion of points, bodies (objects), and systems of bodies without considering the forces that cause the motion.
- Động tử học nghiên cứu chuyển động mà không xét đến nguyên nhân gây ra chuyển động. (Kinematics studies motion without considering the causes of that motion.)
Variants and Related Words
- Chất điểm (n): Point mass. A synonymous term often used interchangeably with "động tử" in physics to denote an object whose size is negligible.
- Hành tinh đôi khi được mô hình hóa như một chất điểm. (A planet is sometimes modeled as a point mass.)
Synonyms
- Particle: A minute portion of matter.
- Point mass: An idealized object with mass concentrated at a single point.
- Moving point: A point that changes location.
Notes on Usage
- Technical Term: "Động tử" is a specialized, academic term used almost exclusively in scientific contexts (physics, mathematics, engineering). It is not used in everyday conversation.
- Context is Key: Its meaning is determined by the scientific discipline. In a physics textbook, it typically means "particle" or "mobile." In a geometry problem, it means "moving point."