C 42s ] 
Both Sides agree, That the Meafure of this Force- 
depends partly upon the Mafs, or Weight, of the 
Body, and partly upon the Velocity with which it 
moves ;fo that, upon any Increafe either of the Weight, 
or of the Velocity, the moving Force will become 
greater. 
They alfo agree, That if the Velocity continue 
the fame, but the Mafs, or Weight of the Body, be 
increafed in any Proportion, the moving Force is in- 
creafed in the fame Proportion: So that, in this Cafe, 
the Meafure of the moving Force is the fame with 
that of the Weight: Or, when two Bodies move 
with the fame Velocity, if the W eight of the fecond 
be double, triple, quadruple, of that of the firft, the 
moving Force of the fecond will alfo be double, tri- 
ple, quadruple, of that of the firfl. 
But, when two Bodies are equal, and the Velo- 
cities with which they move are different, the two 
Parties no longer agree about the Meafure of the 
moving Force. 
One Side maintains, That, when the Velocity of 
the fecond Body is double, triple, quadruple, of that 
of the firft, the Meafure of the moving Force of the fe- 
cond is alfo double, triple, quadruple, of that of the 
moving Force, being the fame with that of the Velocity. 
The other Side pretend. That, in the fame Cafe, 
the moving Force of the fecond Body is four times, 
nine times, fixteen times, as great as that of the firft 5, 
the Meafure of the moving Force being the fame 
with that of the Square of the Velocity. 
In confequence of the Agreement in the firft of 
thefe two Cafes,, and the Difagreement in the fecond, 
the one Side pretends, That the Meafure of the 
moving Force is, in all Cafes, the Produft of the 
Weighs 
