Which of these is an example of acceleration? A. A bicyclist turning around a corner.
B. A car traveling south with its cruise control set.
C. A bus traveling north at 25m/s
D. A helicopter waiting to take off.

Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.