A cyclist travelling across Ontario increases her velocity as she goes downhill coming into Thunder Bay. Choose her velocity at the top of the hill (between 5 m/s [forward] and 9 m/s [forward]), and her velocity at the bottom of the hill (between 15 m/s [forward] and 21 m/s [forward]). If she goes from the top to the bottom in 30 seconds, what is her acceleration?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

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.

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.