A beam with negligible mass is balanced by two external forces at R1 = 1.5 meters and R2 = 6.5 meters. If F1 = 10 N, what is F2.
i got this:
(10)(1.5) + F2(6.5) = 0
so F2 = 2.31 N
but the second part i don't get:
If the beam actually has a weight of 3 N, what would F2 be now?
so i got this so far but i don't know which is which to plug in
m_{1}x_{1}_{i} + m_{2}x_{2}_{i} = m_{1}x_{1}_{f} + m{2}x_{2}_{f}
am i on the right track?
this question has really stumped me.
23 people on a boat rest on water without friction. Each person has an average mass of 70 kg, and the boat itself weighs 10^4 kg. The entire party walks the entire 8 m distance of the boat from bow to stern. How far (in meters) does the boat move?
i know i...