Skip:
it's called "Newton's Second Law of Motion", popularly written F=MA (down,
Dr. Mayf; I know that this is a simplification-- "first principles" is
really differential calculus-- but it looks to me like the simple algebra
works here).
Most of what we are interested in (in racing) is based on this law.
F= force (here, the force we are interested in is (Fad + Frr)-- that is, the
force of the aero drag plus the force of the rolling resistance)
M= mass of the car (or bike) --(you left that out, Dave D.)
A= the acceleration (or DEcelleration, in this case)-- which you will
calculate from your "power shut-off speed", your exit speed, and the time
between the two (yeah, Skip, that's your "delta T"). I think this equation
should work:
(Fad + Frr) = M {(V1 -V2)/(T1 - T2)}
where...
V1 is the speed (in feet per second) at power shut-off
V2 is the speed sometime later
(T1 - T2) is the elapsed time (in seconds) between the two speed
measurements
Russ, #1226B
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/land-speed
/// what is needed. It isn't that difficult, folks.
|