A car travels counterclockwise around a flat circle of radius ...

[wenmo]

A car travels counterclockwise around a flat circle of radius 0.25 km at a constant speed of 20 m/s. When the car is at point A as shown in the figure, what is the car's acceleration?
 
   

   
  a.
  1.6 m/s², south
   
  b.
  Zero
   
  c.
  1.6 m/s², east
   
  d.
  1.6 m/s², north
   
  e.
  1.6 m/s², west

Question 2

The small circles in the diagram below represent the positions along the x axis of a body at equal time intervals. Assume the body moves in a straight line.
 
   
 
   This diagram is most likely to describe

   
  a.
  a swimmer swimming laps.
   
  b.
  an exercise on a rowing machine.
   
  c.
  a person on a treadmill.
   
  d.
  a tennis ball during a volley.
   
  e.
  a runner who tripped, fell, rose, and continued racing.

[sierramartinez]

Answer to Question 1

e

Answer to Question 2

e