Question

which of the following is true about dynamic equilibrium? *
check all that apply.
forces are balanced
force are unbalanced
object is at rest
object is moving with constant velocity
a squirrel travels 8 meters in 4 seconds. how can the squirrel’s velocity be determined? *
4 s/ 8m
8 m/ 4s
4m / 8s
8s / 4m
velocity is ______. *
check all that apply.
direction
force
position
speed

Explanation:

First Question (Dynamic Equilibrium)

Dynamic equilibrium occurs when an object is moving with a constant velocity (so net force is zero, forces are balanced). An object at rest is static equilibrium. So "Forces are balanced" and "Object is moving with constant velocity" are true. "Forces are unbalanced" is false (unbalanced forces cause acceleration, not equilibrium), and "Object is at rest" is static equilibrium, not dynamic.

Step1: Recall velocity formula

Velocity ($v$) is defined as displacement (or distance, for speed/velocity magnitude here) divided by time, so $v = \frac{\text{distance}}{\text{time}}$.

Step2: Identify values

Distance is 8 meters, time is 4 seconds. So velocity is $\frac{8\ \text{m}}{4\ \text{s}}$.

Velocity is a vector quantity that includes speed (magnitude) and direction. It is not force or position. So "direction" and "speed" are correct as velocity has speed (magnitude) and direction.

Answer:

• Forces are balanced
• Object is moving with constant velocity

Second Question (Squirrel's Velocity)