K.E = ¹/₂mv²
= ¹/₂ (mv)v
= ¹/₂ pv ...(i) [Here p is momentum]
As momentum increases by 20%
Thus new momentum =
Putting this new value in eq.(i) we get
Thus the new Kinetic energy will increase by 20% also...
Or, it will be increased by ⁶/₅ times...