4.4+Kinetic+Energy


 * 4.4 ** Kinetic Energy

- Energy of **__moving object__**

- Factors that affect kinetic energy are **__mass__** and **__speed__**

So, the equation used to find kinetic energy calculates work done to give an object a known velocity from rest.

So, the equation is :

W=Fnet Δ ** d ..... ** Since Fnet = m • a,

W = m • a Δ ** d ** **.....** Since a = (v2 – v1) / Δt,

..........................Since v1 = 0, then a = v2 / Δt

..........................Remember that, Δ ** d = ** [ (v1+v2) Δt ] / 2


 * .................................** Which becomes, Δ ** d = ** v2 • Δt / 2

W= m(v2 / Δt)( v2 • Δt / 2)

W= ½ m(v^2)

// Ek // =½ m(v^2) ……Kinetic Energy = ½ • mass • velocity squared

So, m = mass of object (kg) v = velocity of the object (m/s) //Ek// = kinetic energy of the object (Joules)

Link: An old school video about kinetic energy, enjoy! http://www.youtube.com/watch?v=zhX01toLjZs

By: Akshay Nair