1. Consider the position vs time graph at right. a. Determine the average velocity of the object.
Imis
x (m)
60-.
-T
---
b. Write a mathematical equation to describe the
motion of the object.
50---
403
30--1-3
20-
10---1
: ! ! ! !

1 2 3 4 5 6
t(s)

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?