Question

force, mass and acceleration quick check
which situation describes an object that is accelerating? (1 point)
○ when the velocity increases
○ when the velocity is constant
○ when the net force is zero
○ when equal forces act simultaneously

Explanation:

Acceleration is defined as the rate of change of velocity. If velocity is constant, there's no change in velocity, so acceleration is zero. A net force of zero means no unbalanced force, so acceleration is zero (Newton's first law). Equal forces acting simultaneously may cancel out (net force zero) or not, but the key is velocity change. When velocity increases, there's a change in velocity, so acceleration occurs.

Answer:

A. when the velocity increases