How Does the Kinetic Energy Formula Work?

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The kinetic energy formula, W = 1/2 mV², represents the work done to accelerate an object from rest to a velocity V. The factor of 1/2 arises from the integration of force over distance, reflecting that kinetic energy increases with the square of velocity. Mass (m) is included because kinetic energy is directly proportional to the object's mass; heavier objects possess more kinetic energy at the same speed. The formula illustrates that as velocity increases, kinetic energy grows exponentially due to the V² term. This comprehensive explanation clarifies the components and significance of the kinetic energy formula.
herchi
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Hi i would like to know step by step... how the kinetic formula works.
why we multiply by 1/2, by mass, and by v2...what this means?
 
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herchi said:
Hi i would like to know step by step... how the kinetic formula works.
why we multiply by 1/2, by mass, and by v2...what this means?

Start with the definition of the change in kinetic energy
dW=Fdx=m(dV/dt)V(dt)=mVdV (1)
Integrating (1) with the initial condition V=0; W=0
W=mV2/2
Are all your questions answered?
 
I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...

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