Force
Force is defined as the rate of change in momentum. Momentum is simply defined
as the product of mass and velocity.
momentum = mass, m * velocity, v
(momentum = mv).
This means that momentum is a quantity that is dependent on, and proportional to, mass and velocity. Force can also be defined as the product of mass, m and acceleration, a (F = ma) as acceleration is defined as the rate of change in velocity.
F = mv1 - mv2
t
F = m (v1 - v2)
t
a = v1 - v2
t
F =
ma
Daya
Daya ditakrifkan sebagai kadar perubahan momentum. Momentum pula ditakrifkan sebagai hasildarab jisim, m dan halaju, v (momentum = mv).
Ini bermakna momentum adalah kuantiti yang bergantung kepada, dan berkadar dengan, jisim dan halaju. Daya juga boleh ditakrifkan sebagai hasildarab jisim dan pecutan. Ini kerana pecutan ditakrifkan sebagai kadar perubahan halaju
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