Question

question 11 (1 point)
an object moving in the +x axis experiences an acceleration of 2.0 m/s2. this means the object is
traveling at 2.0 m in every second.
traveling at 2.0 m/s in every second.
changing its velocity by 2.0 m/s.
increasing its velocity by 2.0 m/s in every second.

Explanation:

To solve this, we recall the definition of acceleration: acceleration ($a$) is the rate of change of velocity, given by $a=\frac{\Delta v}{\Delta t}$. An acceleration of $2.0\ \text{m/s}^2$ means $\frac{\Delta v}{\Delta t} = 2.0\ \text{m/s per second}$, so velocity changes by $2.0\ \text{m/s}$ every second.

• "traveling at $2.0\ \text{m}$ in every second" describes speed (distance per second), not acceleration.
• "traveling at $2.0\ \text{m/s}$ in every second" is incorrect phrasing (acceleration is change in velocity, not "traveling at" a velocity rate).
• "changing its velocity by $2.0\ \text{m/s}$" is incomplete (needs to specify per second, as acceleration is rate of change).
• "increasing its velocity by $2.0\ \text{m/s}$ in every second" matches the definition: since acceleration is in the $+x$ direction (same as motion direction), velocity increases by $2.0\ \text{m/s}$ each second.

Answer:

increasing its velocity by 2.0 m/s in every second.