Question

The force acting on an object are balanced, then the object:

• A. must be at rest
• B. must be moving
• C. must not be accelerating
• D. must lose energy

Answer 1

Answer: (C)

must not be accelerating

Balanced forces always result in a zero external force acting on an object i.e $F_{ext}=0$

$\therefore$ Acceleration $a=\frac{F_{ext}}{m}=0$

Thus the object must not be accelerating or it must be moving with constant velocity or remain at rest (if it was at rest initially). Hence option C is correct.