what is best to say about a runner who is running at a constant velocity? a. their acceleration is positive…
what is best to say about a runner who is running at a constant velocity? a. their acceleration is positive. b. their acceleration is negative. c. their acceleration is zero. d. their acceleration cannot be determined. please select the best answer from the choices provided. o a o b o c o d
Answer
Answer:
C. Their acceleration is zero.
Explanation:
Step1: Recall acceleration formula
Acceleration $a=\frac{\Delta v}{\Delta t}$, where $\Delta v = v_f - v_i$ (change in velocity).
Step2: Analyze constant - velocity case
If velocity $v$ is constant, then $v_f=v_i$, so $\Delta v = 0$.
Step3: Calculate acceleration
Substituting $\Delta v = 0$ into the acceleration formula, we get $a=\frac{0}{\Delta t}=0$.