Author Question: Two children start at one end of a street, the origin, run to the other end, then head back. On the ... (Read 57 times)

piesebel · **on:** Jul 28, 2018

Two children start at one end of a street, the origin, run to the other end, then head back. On the way back Joan is ahead of Mike. Which statement is correct about the distances run and the displacements from the origin?
a. Joan has run a greater distance and her displacement is greater than Mike's.
b. Mike has run a greater distance and his displacement is greater than Joan's.
c. Joan has run a greater distance, but her displacement is less than Mike's.
d. Mike has run a greater distance, but his displacement is less than Joan's.
e. Mike has run a shorter distance, and his displacement is less than Joan's.

Question 2

The position of a particle moving along the x axis is given by x = (21 + 22t - 6.0t2)m, where t is in s. What is the average velocity during the time interval t = 1.0 s to t = 3.0 s?
a. -6.0 m/s
b. -4.0 m/s
c. -2.0 m/s
d. -8.0 m/s
e. 8.0 m/s