In the picture above, our friend Alison is pulling on the fall of a purchase. She is also pulling on me, and I am the object she is trying to move. Disregarding friction and angles, what is the total mechanical advantage? Hint: notice that Alison is standing on a skateboard that is in line with the pull.
If you think you know the answer, send it to firstname.lastname@example.org, or leave a comment below (please don’t give away the answer by posting it online). The winner, randomly selected from the pool of correct entries, will receive an autographed copy of The Rigger’s Apprentice. Entries must arrive by noon Pacific Time, Monday, June 11th. The winner will be announced on Wednesday, June 13th.
In other news, time is running out to sign up for our 3-day “Rig Your Boat” workshop, here in Port Townsend.