A person who walks for exercise produces the position-time graph shown. Calculate the average velocity, including sign, for (a) segment A, (b) segment B, (c) segment C, and (d) segment D. +1.25 +1.00 B A +0.75 D Position x (km) C +0.50 +0.25 0 0.20 0.40 0.60 0.80 1.00 Time : (h) (a) Number Units (b) Number Units C (c) Number Units C (d) Number H Units CCurrent Attempt in Progress Atourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.37 m/s. The car is a distance d away. The bear is 27.3 m behind the tourist and running at 7.02 m/s. The tourist reaches the car safely. What is the maximum possible value for d? l|'lJear l'Iourist 0 Number I Units Current Attempt in Progress A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the rst part, she rides for 22.9 minutes at an average speed of 8.33 m/s. During the second part, she rides for 36.0 minutes at an average speed of 3.33 m/s. Finally, during the third part, she rides for 10.4 minutes at an average speed of 12.4 m/s. (a) How far has the bicyclist traveled during the entire trip? (b) What is the average speed of the bicyclist for the trip? (a) Number n Units (b) Number n Units 0