- Sum of forces on the beam to be calculated
- Sum of moments on the beam to be calculated
- Sum of forces on the motor to be calculated
F=-kx = kθL^2
Equations of Motion
Would anyone be able to explain why the + and - L/2theta are the way they are?
I believe I understand why k1 is positive and k2 are negative as taking moments about the centre, assuming clockwise is +ve, means that k2 opposes and k1 follows rotation but I don't understand how to assign L/2 a + or -.