You Stand on a Corner as a Friend Drives Past

Multiple Choice

You stand on a corner as a friend drives past in an automobile.You both note the time interval required for the car to travel one block,and you both measure the distance traveled.The proper time interval is measured by _____,and the proper distance is measured by _____.

A) you; you
B) you; your friend
C) your friend; you
D) your friend; your friend
E) your friend; both of you