1. Define average velocity and average acceleration. How does a smart pulley work?

2. Explain the difference between constant velocity and constant acceleration. (b) Are you more likely to be able to walk at a constant velocity or constant acceleration? (c) For the equation = 0 + 0 +1/2 ^2 what does a graph of versus look like? (d) What does the graph look like if = 0?

3. Calculate the average velocity for each of the four-time intervals. What is the physical meaning of a negative average velocity? () 1.38 1.63 2.23 2.08 1.98 () 1.17 1.65 2.08 2.65 3.16