Originally Posted by
doctorgk A boat is pulled into a dock by means of a winch 12 feet above the deck of the boat.
A-._
-..... _
- ........_
- ..........._
- ............._
- ................_
C-................ _B
Thats a 90 degree right triangle, the boat is at B, the winch at A, and line AC is the 12 feet.
The winch pulls in rope at a rate of 4 feet per second. there is 13 feet of rope out (line AB), find the acceleration of the boat.
okay, so i solved for line CB using the pythagorean theorem, which is 5 feet. i know i have to implicitely differentiate, then a second time because it is acceleration. could anyone help me.