Question

10 which statement describes dynamic equilibrium? a. the forces on an object are unbalanced. b. an object has balanced forces acting on it and constant velocity. c. an object is accelerating due to forces acting on it. d. the forces on an object are balanced and there is no motion.

Explanation:

• Dynamic equilibrium means the net force on an object is zero (balanced forces) and the object is in motion with a constant velocity.
• Option A: Unbalanced forces mean no equilibrium (dynamic or static).
• Option C: Acceleration implies unbalanced forces (as \(F = ma\), if \(a

eq0\), \(F
eq0\)), so no equilibrium.

• Option D: Balanced forces but no motion is static equilibrium.

Answer:

B. An object has balanced forces acting on it and constant velocity.