1. The problem statement, all variables and given/known data This is what I was given: A block is placed on a rough wooden plane it is found that when the plane is tilted 30° to the horizontal, the block will slide down at a constant speed. 2. Relevant equations I'm not sure which equations to use other than sinΘmg but I'm not getting the correct answer which is 0.577. 3. The attempt at a solution I then tried tanΘ and got the correct answer but I'm not sure why it's correct. Thank you for any help provided.