Wednesday, April 30, 2008

Question 3: Antidifferentiation and the Flight Paths of Airplanes





The flight of the airplane can be modelled by a piece-wise function that includes three portions. They include the flight acceleration for take off, constant flight, and flight deceleration until landing. For each city-to-city flight, the airplane accelerates for 0.25 hours, decelerates for 2/3 hours and flies the remaining distance at a constant velocity.

A.) Using the given functions and coordinates for each section of the piece-wise function, find the functions s(t)1, s(t)2, and s(t)3.

B.) With the functions s(t)1, s(t)2, and s(t)3, discover which of the three flights (taking into account departure time and flight delays) would arrive in Mexico City first, from the city of Winnipeg. Be sure to show all of your work and the times at which each airplane will arrive at Mexico City (Neglect time zone changes for time).


Route information:



































Question 2: Volumes of Revolution and RC Cars!




When the area between the functions 4x^2 and 2x^3 is spun around the line x = -2, a washer-like solid is formed.

A.) Find the volume of the solid generated.

B.) If the numerical value of the solid's volume is equivalent to the battery life remaining in minutes for a remote controlled car, find the instantaneous velocity in ft/min of the RC car at the end of its battery life span given the following position function:

Monday, April 28, 2008

Question 1: Related Rates and the Related Bicycle



On the countryside, lies an intersection of roads. 12 km North of the intersection is positioned Car A, moving north of the intersection at the rate of 90km/h. 6 km West of the intersection is positioned another Car B, moving towards the intersection at the rate of 72 km/h.

A.) Find the rate at which the distance, c, between cars A and B is increasing. Approximate your answer to the nearest hundreth.

B.) If the rate (dc/dt) at which the distance between vehicles A and B is increasing is numerically equivalent to the time required in hours for a bicycle to reach its destination, find the distance travelled by the bicycle given the following:

  • S(t) = y
  • S(0) = 4

Conclusion of DEV