Isolated System

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Isolated System

If a system is isolated from its environment, then there can be no energy transfers to or from it. For that case, the law of conservation of energy states.

We discussed a special situation for isolated systems-namely, the situation in which non conservative forces (such as a kinetic frictional force) do not act within them. In that special situation, , are both zero, and so. In other words, the mechanical energy of an  slated system is conserved when non conservative forces do not act within it.

To descend, the rock climber must transfer energy from the gravitational potential energy of a system consisting of her, her gear, and Earth. She has wrapped the rope around metal rings so that the rope rubs against the rings. This allows most of the transferred energy to go to the thermal energy of the rope and rings rather than to her kinetic energy

To descend, the rock climber
must transfer energy from the gravitational
potential energy of a system consisting
of her, her gear, and Earth. She
has wrapped the rope around metal
rings so that the rope rubs against the
rings. This allows most of the transferred
energy to go to the thermal energy
of the rope and rings rather than
to her kinetic energy.

 

 

 

 

 

 

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Isolated System