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4.2: Development of Force Concept
https://phys.libretexts.org/Courses/Tuskegee_University/Algebra_Based_Physics_I/04%3A_Dynamics-_Force_and_Newton's_Laws_of_Motion/4.02%3A_Development_of_Force_Concept
Figure $\PageIndex{2}$ :The force exerted by a stretched spring can be used as a standard unit of force. (a) This spring has a length x when undistorted. (b) When stretched a distance $\Delta x$ ...Figure $\PageIndex{2}$ :The force exerted by a stretched spring can be used as a standard unit of force. (a) This spring has a length x when undistorted. (b) When stretched a distance $\Delta x$ the spring exerts a restoring force, $F_{restore}$ which is reproducible. (c) A spring scale is one device that uses a spring to measure force.
2.2: Development of Force Concept
https://phys.libretexts.org/Courses/Skyline/Survey_of_Physics/02%3A_Forces_and_Motion/2.02%3A_Development_of_Force_Concept
Figure $\PageIndex{2}$ :The force exerted by a stretched spring can be used as a standard unit of force. (a) This spring has a length when undistorted. (b) When stretched a distance $\Delta x$ th...Figure $\PageIndex{2}$ :The force exerted by a stretched spring can be used as a standard unit of force. (a) This spring has a length when undistorted. (b) When stretched a distance $\Delta x$ the spring exerts a restoring force, $F_{restore}$ which is reproducible. (c) A spring scale is one device that uses a spring to measure force.
5.1: Forces
https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Physics_I_(2211)/05%3A_Forces/5.01%3A_Forces
The vector $\vec{f}$ represents the friction acting on the car, and it acts to the left, opposing the motion of the car. (We discuss friction in more detail in the next chapter.) In Figure \(\PageIn...The vector $\vec{f}$ represents the friction acting on the car, and it acts to the left, opposing the motion of the car. (We discuss friction in more detail in the next chapter.) In Figure $\PageIndex{1b}$ , all external forces acting on the system add together to produce the net force $\vec{F}_{net}$ .
9.9: Center of Mass (Part 1)
https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019v2/Book%3A_Custom_Physics_textbook_for_JJC/09%3A_Linear_Momentum_and_Collisions/9.09%3A_Center_of_Mass_(Part_1)
An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the ob...An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the object. The center of mass of an object traces out the trajectory dictated by Newton’s second law, due to the net external force. The internal forces within an extended object cannot alter the momentum of the extended object as a whole.
9.10: Center of Mass (Part 2)
https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_I_-_Mechanics_Sound_Oscillations_and_Waves_(OpenStax)/09%3A_Linear_Momentum_and_Collisions/9.10%3A_Center_of_Mass_(Part_2)
The fragment for the explosion on the upper left of the picture had a momentum that pointed upward and to the left; the middle fragment’s momentum pointed upward and slightly to the right; and the rig...The fragment for the explosion on the upper left of the picture had a momentum that pointed upward and to the left; the middle fragment’s momentum pointed upward and slightly to the right; and the right-side explosion clearly upward and to the right (as evidenced by the white rocket exhaust trail visible below the yellow explosion).
9.9: Center of Mass (Part 1)
https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_I_-_Mechanics_Sound_Oscillations_and_Waves_(OpenStax)/09%3A_Linear_Momentum_and_Collisions/9.09%3A_Center_of_Mass_(Part_1)
An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the ob...An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the object. The center of mass of an object traces out the trajectory dictated by Newton’s second law, due to the net external force. The internal forces within an extended object cannot alter the momentum of the extended object as a whole.
3.4.2: Center of Mass (Part 2)
https://phys.libretexts.org/Workbench/PH_245_Textbook_V2/03%3A_Module_2_-_Multi-Dimensional_Mechanics/3.04%3A_Objective_2.d./3.4.02%3A_Center_of_Mass_(Part_2)
The fragment for the explosion on the upper left of the picture had a momentum that pointed upward and to the left; the middle fragment’s momentum pointed upward and slightly to the right; and the rig...The fragment for the explosion on the upper left of the picture had a momentum that pointed upward and to the left; the middle fragment’s momentum pointed upward and slightly to the right; and the right-side explosion clearly upward and to the right (as evidenced by the white rocket exhaust trail visible below the yellow explosion).
3.4.1: Center of Mass (Part 1)
https://phys.libretexts.org/Workbench/PH_245_Textbook_V2/03%3A_Module_2_-_Multi-Dimensional_Mechanics/3.04%3A_Objective_2.d./3.4.01%3A_Center_of_Mass_(Part_1)
An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the ob...An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the object. The center of mass of an object traces out the trajectory dictated by Newton’s second law, due to the net external force. The internal forces within an extended object cannot alter the momentum of the extended object as a whole.
3.3.1: Forces
https://phys.libretexts.org/Workbench/PH_245_Textbook_V2/03%3A_Module_2_-_Multi-Dimensional_Mechanics/3.03%3A_Objective_2.c./3.3.01%3A_Forces
Dynamics is the study of how forces affect the motion of objects, whereas kinematics simply describes the way objects move. Force is a push or pull that can be defined in terms of various standards, a...Dynamics is the study of how forces affect the motion of objects, whereas kinematics simply describes the way objects move. Force is a push or pull that can be defined in terms of various standards, and it is a vector that has both magnitude and direction. External forces are any outside forces that act on a body. A free-body diagram is a drawing of all external forces acting on a body. The SI unit of force is the newton (N).
8.9: Center of Mass (Part 1)
https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019/Book%3A_Physics_(Boundless)/08%3A_Linear_Momentum_and_Collisions/8.09%3A_Center_of_Mass_(Part_1)
An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the ob...An extended object (made up of many objects) has a defined position vector called the center of mass. The center of mass can be thought of, loosely, as the average location of the total mass of the object. The center of mass of an object traces out the trajectory dictated by Newton’s second law, due to the net external force. The internal forces within an extended object cannot alter the momentum of the extended object as a whole.
8.10: Center of Mass (Part 2)
https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019/Book%3A_Physics_(Boundless)/08%3A_Linear_Momentum_and_Collisions/8.10%3A_Center_of_Mass_(Part_2)
The fragment for the explosion on the upper left of the picture had a momentum that pointed upward and to the left; the middle fragment’s momentum pointed upward and slightly to the right; and the rig...The fragment for the explosion on the upper left of the picture had a momentum that pointed upward and to the left; the middle fragment’s momentum pointed upward and slightly to the right; and the right-side explosion clearly upward and to the right (as evidenced by the white rocket exhaust trail visible below the yellow explosion).

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