Answer:

C. Velocity is acting on it.

Explanation:

Inertia: tendency of an object to resist changes in its velocity. ... Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. An object in motion with a velocity of 2 m/s, East will (in the absence of an unbalanced force) remain in motion with a velocity of 2 m/s, East.

Question:

If an object starts to accelerate ____________________

a. An unbalanced force is acting on it.

b. Gravity is acting on it.

c. Velocity is acting on it.

d. a balanced force is acting on it.​

Answer:

If an object starts to accelerate ____________________

a. An unbalanced force is acting on it.

b. Gravity is acting on it.

c. Velocity is acting on it.

d. a balanced force is acting on it.​

Why Velocity is acting on it?

When an object begins to accelerate, it means it's velocity changes from zero to a non-zero value and keeps increasing. This is because acceleration means a change in the velocity, and velocity can only change when an unbalanced external force is acting on it. According to Newton's First Law of Motion, a body continues to be at rest unless an external unbalanced force acts on it.

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