# The Naked Scientists Forum

### Author Topic: newton's causality in F=ma vs. archimedes' leverlaw  (Read 2623 times)

#### dedaNoe

• Jr. Member
• Posts: 30
##### newton's causality in F=ma vs. archimedes' leverlaw
« on: 08/04/2007 04:08:31 »
the leverlaw says: F1/F2=M1/M2=D2/D1 from where F1/M1=F2/M2=G this means that in a balanced lever the masses are analogy for force or the force-mass ratio is same for all weights. that's what makes the libra functional - maintaining eqaul force-mass ratio for every weight it measures. if G was acceleration as newton claims then why in same time the heavier weight passes less distance then the lighter one to meet him in the center. for instance, when you fire a bullet from a gun the lighter bullet moves further away forward from the firing point then the heavier gun in reverse direction.

#### Atomic-S

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##### newton's causality in F=ma vs. archimedes' leverlaw
« Reply #1 on: 08/04/2007 05:40:20 »
Momentum is mass times velocity. Conservation of momentum means that the sum of all momentum of an isolated system must remain the same. Thus, when a gun fires, the small mass of the bullet times its large velocity matches the large mass of the gun times its small velocity.

#### dedaNoe

• Jr. Member
• Posts: 30
##### newton's causality in F=ma vs. archimedes' leverlaw
« Reply #2 on: 08/04/2007 12:10:34 »
F_1D_1=F_2D_2 and D=Vt => F_1V_1=F_2V_2
it reads velocities reciprocate the forces in balanced lever.

don't try to tell me that the leverlaw from 250BCE can be derived from newton's mechanics which is 19 centuries younger. archimedes was the wise one but he didn't travel trough time - forward in future 19 centuries - to snack pick in newton's work and get the idea for the unitary leverlaw.

#### The Naked Scientists Forum

##### newton's causality in F=ma vs. archimedes' leverlaw
« Reply #2 on: 08/04/2007 12:10:34 »