Physics Review Question

Unit: Mechanics
Year: 1991 Question#: 13
Question: What is the essential characteristic of an object at equilibrium.

(1 ) Zero velocity
(2 ) zero acceleration
(3 ) zero potential energy
(4 ) zero kinetic energy

What is this question really asking?




Explanation by: Jarrett sk

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Answer 1
Zero velocity

INCORRECT

An object can be at equilibrium and have a velocity. Remember Fnet = 0 when something is at equilibrium. return to top























Answer 2
zero acceleration

CORRECT

An object at equilibrium cannot be accelerating or decelerateing. It must be moving at a constant velocity. Remember Fnet = 0 when something is at equilibrium. return to top



























Answer 3
zero potential energy

INCORRECT

An object at equilibrium can have potential energy. An example would be a marble moving at equilibrium on a table. The marble has PE to fall downward. Remember Fnet = 0 when something is at equilibrium. return to top


























Answer 4
zero kinetic energy

INCORRECT

An object can have KE (be in motion) and be at equilibrium. Remember Fnet = 0 when something is at equilibrium. return to top


























What's this question really asking?

This question is asking about the proprties of an object at equilibrium. return to top

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