Challenge of the Month - July 2019

Here we are beginning another new section in our blog. There would be simple physics problems posed in this section and the challenge is to solve them in the most elegant manner possible.

Watch the following video carefully and try answering the questions that follow:



Q1. What is the physical fact the video demonstrates?
Q2. What is the length of the rope the guys are swinging with? 

The answer can be posted in the comment box or my students can approach me in person to provide a solution to the problem or more enthusiastic friends can contact me @ kazsyednew@gmail.com.I can't reward the problem solvers but I shall site their answers with credits.