2007-09-04

An arrow is shot at 40 m/s and one second after shooting it the person who shots it hears it hit the target. The speed of sound is 340 m/s. How far away was the target?
- There was also the interesting problem in the Tipler "Physics for scientists and engineers" book on page 44, #9, where you have to be running away from aliens at approximately 120 km/h and you have to touch somebody in the seat next to you etc.

And now for a question from the UT Austin calculus homework. We start off with v(t) = 6sin(t) - 5cos(t) and find s(t) if s(0)=1.

Did four or five problems from some UT homework concerning the derivative of velocity or integrals of accelerations in order to determine other values.