The discussion revolves around the relationship between force, acceleration, and momentum, specifically examining the implications of Newton's laws of motion. Participants explore the definitions and expressions related to these concepts, including the equations F=ma, p=mv, and the change in momentum.
Participants generally agree on the relationship between force and momentum change, but there is disagreement regarding the precise expressions and terminology used. The discussion remains unresolved on some points, particularly concerning the derivation of the laws and the clarity of expressions.
Some participants express uncertainty about the clarity of the initial question posed and the implications of the terminology used in the discussion. There are references to previous discussions that may provide additional context but are not fully explored in this thread.
What exactly is your question? Yes, a net force on a body does change its momentum.-Physician said:We know that
##F=ma## or ##F=ma=m \frac{v}{t}##, so the acceleration is rate of slowing or speeding velocity, then does force changes the momentum ##p=mv## or ##p=Ft##.
I'm waiting an answer, thanks!:)
Doc Al, the correct expression of this would be FΔt = Δp, no? Ft = p strikes me as imprecise, confusing Δp with p, which is mv. In other words, we use FT or FΔt to find change in momentum, and mv to find momentum. Correct?Doc Al said:Yes, a net force on a body does change its momentum.
Yes, I already pointed that out yesterday:zoobyshoe said:Doc Al, the correct expression of this would be FΔt = Δp, no? Ft = p strikes me as imprecise, confusing Δp with p, which is mv. In other words, we use FT or FΔt to find change in momentum, and mv to find momentum. Correct?
Right. Sure, his statements were inaccurate. But first I wanted to find out what his question was, as it wasn't clear to me just what he was trying to do.zoobyshoe said:Doc Al, the correct expression of this would be FΔt = Δp, no? Ft = p strikes me as imprecise, confusing Δp with p, which is mv. In other words, we use FT or FΔt to find change in momentum, and mv to find momentum. Correct?
Me either. I just wanted to clarify because I'm talking to another guy in another thread who seemed to think Ft = p, as opposed to Δp. Seeing it twice made me wonder if it was somehow acceptable in some way shape or form I wasn't aware of. Thanks.Doc Al said:Right. Sure, his statements were inaccurate. But first I wanted to find out what his question was, as it wasn't clear to me just what he was trying to do.