Physics

Physics, 16.10.2019 14:30, cannan

How do different forces act on a system

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History, 02.07.2019 13:40, ketricduggerp2ciuc

Which of these forces comprises unwritten, common rules and perceptions about relationships? (1pts) economic forces political forces social forces legal forces personal forces?

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Physics, 26.07.2019 12:50, tierann46

Momentum of a system is conserved only when question 16 options: there are no internal forces acting on the system. the system is not moving. there are no forces acting on the system. there is no net external force acting on the system. the system has zero momentum.

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Physics, 17.09.2019 19:00, owenr4758

Learning goal: to review the concept of conservative forces and to understand that electrostatic forces are, in fact, conservative. as you may recall from mechanics, some forces have a very special property, namely, that the work done on an object does not depend on the object's trajectory; rather, it depends only on the initial and the final positions of the object. such forces are called conservative forces. if only conservative forces act within a closed system, the total amount of mechanical energy is conserved within the system (hence the term "conservative"). such forces have a number of properties that simplify the solution of many problems. you may also recall that a potential energy function can be defined with respect to a conservative force. this property of conservative forces will be of particular interest of us. not all forces that we deal with are conservative, of course. for instance, the amount of work done by a frictional force very much depends on the object's trajectory. friction, therefore, is not a conservative force. in contrast, the gravitational force is the most common example of a conservative force. what about electrostatic (coulomb) forces? are they conservative, and is there a potential energy function associated with them?

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Physics, 27.09.2019 01:30, jexvilla

The forces that a and b exert on each other are very large but last for a very short time. if we choose a time interval from just before to just after the collision, what is the approximate value of the impulse applied to the two-object system due to forces exerted on the system by objects outside the system?

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