Question

Please check my work for both a and b. Help me with c.

Answer 1

A runner runs in a straight line with the average velocity of 5i-hat m/s for 5 minutes and then with an average velocity of 4i-hat m/s 4 minutes.

Answer 2

c) suppose her goal is to run 5 km in 15 minutes. What average velocity must she have over the remaining portion of her run?

Answer 3

(a) 2460ˆim (b) 4.56ˆim/s (c) 7.06ˆim/s

Answer 4

a) what is her total displacement:
b)What is her average velocity during this time: