- #1
vanillin
- 4
- 0
Hello, I'm new and quite unfamiliar with all the conventions, but I'll use underline for vectors since I couldn't find the proper thing (is the convention to use bold here?)
Problem:
No more.Relevant equations:
Fnet = ma = 0
τnet = Iα = 0
τ = r x F = rFsinθ
Fbuoyancy = ρwaterVgAttempt at solving:
What I realized is that since the plank isn't in translational nor rotational motion, the net force and torque are both zero. T = tension, G = gravitational f., B = buoyancy.
T + G + B = 0
in scalar:
T + G - B = 0
Also, I know how to equate the torques (only gravity and buoyancy cause torque), but I can't find out the distances nor angles. I can also express the gravitational force in terms of density of the plank and it's volume...? Things just don't cancel out neatly there.
I can provide a diagram if really necessary, but I'd prefer not to now, I have very limited time. Thanks in advance. Also, is the template there to be followed rigorously or is any kind of organised posting viable?
Problem:
No more.Relevant equations:
Fnet = ma = 0
τnet = Iα = 0
τ = r x F = rFsinθ
Fbuoyancy = ρwaterVgAttempt at solving:
What I realized is that since the plank isn't in translational nor rotational motion, the net force and torque are both zero. T = tension, G = gravitational f., B = buoyancy.
T + G + B = 0
in scalar:
T + G - B = 0
Also, I know how to equate the torques (only gravity and buoyancy cause torque), but I can't find out the distances nor angles. I can also express the gravitational force in terms of density of the plank and it's volume...? Things just don't cancel out neatly there.
I can provide a diagram if really necessary, but I'd prefer not to now, I have very limited time. Thanks in advance. Also, is the template there to be followed rigorously or is any kind of organised posting viable?
Last edited: