How do you determine the average speed of an object in cm/s

An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector   between points f and g.

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body