Содержание
- 2. Course of lectures «Contemporary Physics: Part1» Lecture №3 Dynamics of mas point and rigid body. Newton’s
- 3. Previously we described motion in terms of position, velocity, and acceleration without considering what might cause
- 4. The Concept of Force contact forces field forces
- 5. The Concept of Force The only known fundamental forces in nature are all field forces: gravitational
- 6. The Concept of Force
- 7. If an object does not interact with other objects, it is possible to identify a reference
- 8. Such a reference frame is called an inertial frame of reference. Any reference frame that moves
- 9. When no force acts on an object, the acceleration of the object is zero. In the
- 10. Mass Mass is that property of an object that specifies how much resistance an object exhibits
- 11. To describe mass quantitatively, we begin by experimentally comparing the accelerations a given force produces on
- 12. Mass is an inherent property of an object and is independent of the object’s surroundings and
- 13. Mass should not be confused with weight. Mass and weight are two different quantities. The weight
- 14. Newton’s first law explains what happens to an object when no forces act on it. It
- 15. Imagine performing an experiment in which you push a block of ice across a frictionless horizontal
- 16. The acceleration of an object also depends on its mass, as stated in the preceding section.
- 17. According to this observation, we conclude that the magnitude of the acceleration of an object is
- 18. Thus, we can relate mass, acceleration, and force through the following mathematical statement of Newton’s second
- 19. The SI unit of force is the newton, which is defined as the force that, when
- 20. (2.4) The Gravitational Force and Weight
- 21. The Gravitational Force and Weight
- 22. If you press against a corner of this textbook with your fingertip, the book pushes back
- 23. Forces always occur in pairs, or that a single isolated force cannot exist. The force that
- 24. Newton’s Third Law
- 25. Newton’s Third Law When we apply Newton’s laws to an object, we are interested only in
- 26. Newton’s Third Law Objects in Equilibrium If the acceleration of an object that can be modeled
- 27. Newton’s Third Law Objects Experiencing a Net Force constant
- 28. Actions of bodies to each other, making the accelerations, called forces. All forces can be divided
- 29. Except elastic forces at the direct contact can appear forces of another type so called forces
- 30. The force that counteracts F and keeps the trash can from moving acts to the left
- 31. The magnitude of the force of static friction between any two surfaces in contact can have
- 32. We call the friction force for an object in motion the force of kinetic friction fk
- 33. The magnitude of the force of kinetic friction acting between two surfaces is where is the
- 34. A particle moving with uniform speed v in a circular path of radius r experiences an
- 35. Figure 2. Overhead view of a ball moving in a circular path in a horizontal plane.
- 36. If a particle moves with varying speed in a circular path, there is, in addition to
- 37. Nonuniform Circular Motion A small sphere of mass m is attached to the end of a
- 38. Motion in Accelerated Frames Figure 3. (a) A car approaching a curved exit ramp. What causes
- 39. Motion in Accelerated Frames Figure 4.
- 41. Скачать презентацию