STEP workshop - 2020 Sutton Trust Summer School in Cambridge

Parth, a Student Ambassador, together with Yuxin guides participants in the Sutton Trust Summer School through the solution to STEP questions in this live workshop. (Question 10 from STEP 2, 2018.)

[@primsiren1740]

For the last part of the question, if each part of the string moves with a different speed how can you take the velocity of the ant relative to the string to be v?

[@primsiren1740]

After thinking about it for a while I think I have started to understand it. How the parts of the string below the ant move are irrelevant because the velocity v is said to be relative to the string (even if each part moves with a different velocity), it is really really weird.