5. We denote the mass of the father as mand his initial speed vi. The initial kinetic energy of the father is KKi=12sonand his final kinetic energy (when his speed is vf= vi+ 1.0 m/s) is f=son. We use these relations along with Eq. 7-1 in our solution. (a) We see from the above that if=12which (with SI units understood) leads to ()221111.0 m/s222iimvm vªº=+«»¬¼.The mass cancels and we find a second-degree equation for
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