Question

1. an object with zero acceleration must be:

a. at rest
b. moving with constant velocity
c. moving with increasing speed
d. floating

Explanation:

Acceleration is the rate of change of velocity. If acceleration \(a = 0\), then \(\frac{\Delta v}{\Delta t}=0\), which means \(\Delta v = 0\) (velocity change is zero). An object at rest has \(v = 0\) (a special case of constant velocity where \(v=0\)), but the general case for zero acceleration is constant velocity (which can include \(v = 0\), but also \(v= 5\space m/s\) etc., as long as \(v\) doesn't change). Option A is too restrictive (only a subset of the zero - acceleration cases). Option C implies \(\Delta v>0\) (since speed is increasing, velocity is changing), so \(a
eq0\). Option D is not a general physics term related to the kinematic definition of zero acceleration.

Answer:

B. Moving with constant velocity