- #1
Hema
- 9
- 0
Homework Statement
Under the action of force P the constant acceleration of B is 6 m/s^2 up the incline as in figure. For the instant when B's velocity is 3 m/s up incline, what is the velocity of point C? How do I solve this using constraints?
[/B]
Homework Equations
For a pulley system ΣT.v = 0 since internal work done adds up to zero
T*2-2T*3+TVc = 0 (given in my book) which gives Vc = 4 m/s.
The Attempt at a Solution
It had been previously proven that Va = 2 m/s at the instant mentioned. I decided that the equation T*2-2T*3+TVc = 0 was for the points A, C and D. Was I right? Am I allowed to take points C and D for the equation? If I am, why is it so? If the equation is not for A, C and D then for which points is it? The solution had previously used A and B for the constraint equation to find A's velocity, using the equation -2T*3 + 3TVa = 0.