A man stands still on a moving walkway and a woman walks past him in the same direction as the escalator. To a stationary observer, the man has a
speed of 0.3 m/s and the woman has a speed of 0.38 m/s. From the frame of
reference of the man on the escalator, how fast is the woman walking?
A. 0.68 m/s
B. 0.08 m/s
C. 0.3 m/s
D. 0.38 m/s

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)