MonoMonday: Balance - of Forces

Laurie54's choice of theme for today's MonoMonday is "Balance" (many thanks Laurie for hosting this month).

I saw this helium balloon flying over a car salesroom this morning when I went out for a walk bliphunt. There's a balance of forces going on here: the upthrust from the atmosphere is pushing it upwards (as it's lighter than air) and the wind is pushing it sideways, but those are balanced by the tension in the string. So it's (more or less!) stationary (give or take a wobble or two as the wind changes).

(Thanks to Archimedes and Isaac Newton for sorting these things out!!)