An object's motion changes A. only if the object is at rest when a force acts upon it.
B. when there are no forces acting upon it.
C. only when a nonzero net force is applied to the object.
D. when the forces acting on the object remain balanced.

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.