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Chapter 11

Dynamics of Rotational Motions

מומנט
מומנט
Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as ...
חישובי מומנט נטו
חישובי מומנט נטו
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is ...
משוואת הדינמיקה הסיבובית
משוואת הדינמיקה הסיבובית
Angular variables are introduced in rotational dynamics. Comparing the definitions of angular variables with the definitions of linear kinematic ...
מתגלגל מבלי להחליק
מתגלגל מבלי להחליק
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a ...
מתגלגל עם החלקה
מתגלגל עם החלקה
Rolling with slipping is a physical phenomenon that occurs when a rolling object experiences both rotational and linear motion but also experiences ...
עבודה וכוח לתנועה סיבובית
עבודה וכוח לתנועה סיבובית
Work and power in rotational motion are completely analogous to work and power in translational motion. The total work done to rotate a rigid body through ...
משפט עבודה-אנרגיה לתנועה סיבובית
משפט עבודה-אנרגיה לתנועה סיבובית
The work-energy theorem for rotational motion is analogous to the work-energy theorem in translational motion. It states that the net work done by an ...
תנע זוויתי: חלקיק בודד
תנע זוויתי: חלקיק בודד
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector ...
תנע זוויתי: גוף קשיח
תנע זוויתי: גוף קשיח
The total angular momentum of a rigid body can be calculated using the summation of the angular momentum of all the tiny particles rotating in the same ...
שימור התנע הזוויתי
שימור התנע הזוויתי
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Considering a system that consists of n ...
שימור התנע הזוויתי: יישום
שימור התנע הזוויתי: יישום
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely ...
סיבוב של חלק עליון אסימטרי
סיבוב של חלק עליון אסימטרי
By definition, a spherically symmetric body has the same moment of inertia about any axis passing through its center of mass. This situation changes if ...
גירוסקופ
גירוסקופ
A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis ...
ג'ירוסקופ: נקיפה
ג'ירוסקופ: נקיפה
Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a ...
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