Spirit Level in Accelerated Frame: rotation always involves acceleration as demonstrated by this beautiful sprit level. The level can correctly determine the direction of gravitational pull only when it is not undergoing acceleration. ➡ Follow the link in my profile for more info about where to get many of the amazing items featured here on @physicsfun. #physics #physicsfun #physicstoy #spiritlevel #centripetalacceleration #angularmomentum #parabola #pascalsprinciple #hydrostatics #spinning #kin