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7.25 (a) In a skating performance an initially motionless 80.0kg clown throws a fake barbell away. The clowns ice skates allow him to recoil frictionlessly. If the clown recoils with a velocity of 0.500 m/s and the barbell is thrown with a ve- locity of 10.0 m/s, what is the mass of the barbell? (b) How much kinetic energy is gained by this maneuver? (c) Where does the kinetic energy come from?
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    Please sketch the initial and final situations During an ice skating performance, an initially motionless 80.0-kg clown throws a fake barbell away. The clown's ice skates allow her to recoil without friction. If the clown recoils with a velocity of 0.500m/s and the barbell is thrown with a velocity of 10.0m/s. a)Determine the mass of the barbell; b)The clown throws the barbell in 0.40-s, determine the force exerted to the barbell by the clown. (Please sketch the "initial” and "final”...

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