I need the problem worked out for #52 chapter 9please. A 144 g baseball moving 2

Question

I need the problem worked out for #52 chapter 9please. A 144 g baseball moving 28 m/s strikes a stationary 5.25 kgbrick resting on small rollers so it moves without significantfriction. After hitting the brick, the baseball bounces straightback, and the brick moves forward at 1.10 m/s (a) what is thebaseball's speed after the collision? (b) find the total kineticenergy before and after the collison. I need the problem worked out for #52 chapter 9please. A 144 g baseball moving 28 m/s strikes a stationary 5.25 kgbrick resting on small rollers so it moves without significantfriction. After hitting the brick, the baseball bounces straightback, and the brick moves forward at 1.10 m/s (a) what is thebaseball's speed after the collision? (b) find the total kineticenergy before and after the collison.

Explanation / Answer

momentum must be conserved. initial momentum=Mass Ball*velocityball=4.032 finalmomentum=Massball*velocityball+Massbrick*velocitybrick=.144Vball+5.775 equate initial momentum and final momentum: 4.032=.144Vball+5.775          solve for Vball Vball=(4.032-5.775)/.144=-12.1m/s    so a speed of 12.1m/s to the left is the finalvelocity of the ball. b) the kinetic energy before the collision is 1/2*Mball*Vinitialball^2=56.45K after the collision 1/2Mball*Vfinalball^2 +1/2MbrickVbrick=13.72J

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