Question

Essential characteristic of equilibrium is

• A. momentum equals to zero
• B. acceleration equals to zero
• C. K.E equals to zero
• D. velocity equals to zero

Answer 1

The correct option is B

acceleration equals to zero

The explanation for the correct answer:

1. If an object is said to be in a state of equilibrium, then all the forces which act upon the object are balanced. It is defined as the state of rest due to the equal action of the opposing forces.
2. Essential characteristic of equilibrium has to be net force equal to zero.
3. If, ${\mathrm{F}}_{\mathrm{net}}=0$
4. then, $\mathrm{ma}=0$ [From Newton's second law]
5. where $\mathrm{m}$= mass of the body and $\mathrm{a}$ = acceleration of the body.
6. Mass cannot be zero, so the acceleration has to be zero.

Therefore, the essential characteristic of equilibrium is that acceleration equals zero. Thus option B is correct.