A 144-g baseball moving 28.0 m/s strikes a stationary 5.25-kg brick resting on small rollers so it

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A 144-g baseball moving 28.0 m/s strikes a stationary 5.25-kg brick resting on small rollers so it moves without significant friction. After hitting the brick, the baseball bounces straight back, and the brick moves forward at 1.10m/s.
(a) What is the baseball's speed after the collision?
(b) Find the total kinetic energy before and after the collision.
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