First slide
NA
Question

If momentum is increased by 20%, then K.E. increases by __%

Moderate
Solution

E=P22m.  If m  is constant then  EP2
E2E1=P2P12=1.2PP2=1.44
E2=1.44E1=E1+0.44E1
E2=E1+44%  of  E1
i.e. the kinetic energy will increase by 44%

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