Recent content by urbanyoung

Hi, I'm doing some mechanics study and one thing keeps confusing me. In the textbook (Serway/Jewett Physics for scientists and engineers, 7th ed) they introduce i into integral equations. I've put a picture of it below to save me from trying to type the symbols. The equation is for the work...

Homework Statement A mass of 20kg is hanging on a rope. Another cord is tied to the rope part way down and is attached to a wall. This causes the rope to make a 60 degree angle to the ceiling. a) Calculate the tension force in the upper section of the rope. b) Calculate the force exerted by...