1. The problem statement, all variables and given/known data A cup is spinning around on a Lazy Susan... 2. Relevant equations 3. The attempt at a solution My question is about the perspective. The picture on my book is like this: ___________|---0.5m---\_/ ===================== So should I draw the free body diagram from this perspective, with the weight by the Earth on the cup pointing down, or from the top down perspective where I can see the friction force?