An elevator descends at a constant velocity. Which of the following is true? The total energy...
An elevator descends at a constant velocity. Which of the following is true?
- The total energy of the elevator is conserved because no net external force acts on the elevator.
- The total energy of the elevator is conserved because energy is always conserved.
- The total energy of the elevator is not conserved because a net external force acts on the elevator.
- The total energy of the elevator is not conserved because a non-conservative force does work on the elevator.
The wagon exerts a force... (Choose ALL that apply.)
- downward on the Earth due to contact
- upward on the Earth due to contact
- upward on the Earth due to gravitational attraction
- downward on the Earth due to gravitational attraction
- downward to the left on the handle
Homework Answers
Option b is correct because no matter net force is acting or not energy of is always coserved because energy can nither be created nor be destroyed i.e. it is conserved
Option a is correct because earth will attract wagon with gravitational force and as a reaction wagon will apply downward force on earth but it is due to contact
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An elevator descends at a constant
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