A rescue plane flies horizontally at a constant speed searching for a disabled boat. When the plane is directly above the boat, the boat's crew blows a loud horn. By the time the plane's sound detector receives the horn's sound, the plane has traveled a distance equal to one-fourth its altitude above the ocean. Assuming it takes the sound 2.02 s to reach the plane, and taking the speed of sound to be 343 m/s, determine the following.(a) The speed of the plane. (Take the speed of sound to be 343 m/s.) ___m/s (b) What is its altitude? ___m

a The speed of the plane is  

b The altitude of the plane is

Explanation:

    Let the  altitude of the plane  is  Z

     The distance at which the plane hears the horn is  

    The time taken for the sound to reach the plane is  

     The speed of sound is  

The distance from the point the plane hears the sound to the boat is mathematically evaluated as

   substituting values

This is the diagonal distance of the boat to the plane (hypotenuse)  

The altitude of the plane is the vertical distance of the plane from the boat

and the horizontal distance of the plane from the boat is d

Applying Pythagoras theorem

=>      

       substituting values

=>      

=>      

=>      

=>      

Now the velocity of the plane is  

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.