Recent content by lucas83

Thanks for your replies. If I apply "F" to something heavy, "d" will not be the same that if I apply "F" to something lighter, I can spend Joules and product null work therefore I consider work represent the amount of energy transmitted into motion? maybe..? I guess that's why work is expressed...

I give just one tug on a rope attached to a sled and this sled drifts over a distance d after the impulsion, then it stops due to friction, whatever, may I apply the formula F.d? or... is "d" the distance all along which I applied the force in the case I'd drag that sled, to say until the sled...

Hello, thanks for replies. "while the force is applied" ? so ||F|| applied for Δt causing to cover Δd... then why not? W = cos(a).||F||.Δt . Δd I still do not get it.

Hello, I have trouble to get what work is. I find physics notions difficult to understand and I'm kinda bit astray like Rainman in that movie when he walks that moving walkway the wrong way, realizing he's not progressing. Could you, please, explain me with human words what work really...