Relative motion can best be defined as
a. the motion of an object with a constant velocity.
b. the motion of one object as it appears to another object.
c. the change in position of an object divided by change in time.
d. the amount of motion that an object experiences over a given period of time.

Asher cycles 12 miles in 16 hours. what is his speed?

What is special about a dc circuit ?

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.