there is no formula w = m g the only valid formula is from Newton: F = m a in our case is a = g
F = m g F = 1 kg = 9,81 m s^-2 F = 9,81 N that's it ----- Original Message ----- From: "Gene Mechtly" <[EMAIL PROTECTED]> To: "U.S. Metric Association" <[EMAIL PROTECTED]> Cc: "U.S. Metric Association" <[EMAIL PROTECTED]> Sent: Saturday, October 12, 2002 12:29 AM Subject: [USMA:22633] Newton's 2nd Law applied to Water > On Fri, 11 Oct 2002, John Nichols wrote: > > ... > > Next time you are talking about imperial ask the imperial specialist what > > the unit weight is for water? > > What *location* do you have in mind for this specification of force of > gravity (weight) acting on one kilogram of water? Clearly, in SI, a unit > mass of water is one kilogram of water, and its weight is w = m g, where m > = 1 kg. But what is the value of g (in m/s^2) that you have in mind? > > Gene. >
