1. A point is moving along thex-axis with a constant speed. It is initially located at +2.0 m and 180 s later it is located at -5.0 m . What is the average velocity of the point?
2. A swimmer competes in a 100 m race. He completes the length of the 50.0 m swimming pool in 39.5 s, and makes the return lap in 42.0 s. (Assume that the swimmer moves in a straight line through his lane.): a. What is the average velocity for the first length? b. What is the average velocity for the return length? c. What is the average velocity of the race?
3. An object that travels 32.75 m in 18.25 s: a. What is its speed? b. Would this be its velocity as well? Why or why not?

Please help me answer these questions with full calculations. Thank you!