On Apr 13, 3:28 pm, "Randy Poe" <poespam-t...@yahoo.com> wrote:
On Apr 13, 12:36 pm, "Peter" <Poakfi...@msn.com> wrote:
On Apr 13, 12:19 pm, "Randy Poe" <poespam-t...@yahoo.com> wrote:
Could you please clarify the following, I don't get it:
Vector velocity is not "conserved" in the absence of forces in
the same direction. If there is no force in the direction of motion,
then no work is done and energy is conserved, speed is
conserved. But vector velocity is altered.
You said this:
"velocity is a vector, regardless of how the object moves, and is
conserved if no forces in the direction of its motion act on it. "
It's a false statement. Velocity is not conserved in that
case. KE and speed are unaltered in that case, but
velocity is altered.
- Randy
You are right: the direction of the velocity of an object changes if
radial forces act on it.
Peter
.
