- #1

luis20

- 50

- 0

I have a simple question and then a more importante question:

F=dq/dt=ma

(torque)T=dL/dt

What do you call these equations, Newton-euler equations?

I use these equations all the time to relate forces and torques with motion, in certain mechanisms.

But suddenly, the principle of virtual work appears.

I think that virtual work is nothing more than a deduction of the previous equations, where we do F-ma=0 and T-dL/dt=0 and multiply by any displacement, since 0*displacement=0.

I heard that virtual work is used a lot! But I can't get it, what does virtual work bring new?

Another question of curiosity, virtual work was used at the beggining for static or dynamic?

Thanks a lot for the answers