This problem requires us to identify the magnitude of the acceleration of objects. We'll need Newton's second law and the expression for the change in velocity.

Newton's second law:

$\overline{){\mathbf{\Sigma}}{\mathbf{F}}{\mathbf{=}}{\mathbf{m}}{\mathbf{a}}}$

Acceleration:

$\overline{){\mathbf{a}}{\mathbf{=}}\frac{\mathbf{\u2206}\mathbf{v}}{\mathbf{\u2206}\mathbf{t}}}$

Which object has zero acceleration?

A) one at rest

B) one moving at constant velocity

C) one in mechanical equilibrium

D) all of the above

E) none of the above

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Intro to Forces + Newton's Laws concept. You can view video lessons to learn Intro to Forces + Newton's Laws. Or if you need more Intro to Forces + Newton's Laws practice, you can also practice Intro to Forces + Newton's Laws practice problems.