Displacement vs Time Graph (Activity 20A)

Lew W.S.
Refer to Add Math 360 Text Page 499 Activity 20A for detailed instructions.
1. At what time t does the particle change direction (turn back)? 2. When is the particle instantaneously at rest? (State the value of t when this occurs) 3. Is the velocity of the particle at time t = 0 , also zero? If not, what is the velocity? 4. When does the particle return to the fixed point O?