Robin jogs with an average speed of 5.5\,\dfrac{\text m}{\text s}5.5 s m 5, point, 5, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction for 3.3\,\text s3.3s3, point, 3, start text, s, end text.

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?