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Author Question: A car travels counterclockwise around a flat circle of radius 0.25 km at a constant speed of 20 m/s. ... (Read 301 times)

wenmo

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  • Posts: 540
on: Jul 28, 2018

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

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  • Posts: 313
Reply #1 on: Jul 28, 2018
Answer to Question 1

e

Answer to Question 2

e


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