Thursday, September 16, 2010

4th blog assignment

When a plane is in the air on cruise control it can be traveling with a velocity ( how quickly an object is changing displacement over a period of time) of close to 400 mph. While at the same time have an acceleration (the rate at which velocity changes) of 0 m/s^2. This is possible because though the plane is continuously moving, the velocity and direction are staying the same.

       1) Which of the following situations show a person having no acceleration?
             A) A skier going down a slope
             B) A car hitting its brakes
             C) A man sleeping on the couch. *
       2) When do you not have acceleration?
             A) When you are moving at a  constant speed? *
             B) When you are slowing down?
             C) When you are changing direction?
       3) What is the acceleration of this vehicle?
                        
               A) 50mps^2
               B) 0 mps^2  *                 
               C) 500 mph

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