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Q. A cardinal (Richmondena cardinalis) of mass 4.20×10-2 kg and a baseball of mass 0.150 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum?

Q. A box of books weighing 327 N is shoved across the floor by a force of 471 N exerted downward at an angle of 35° below the horizontalIf μk between the box and the floor is 0.52, how long does it take to move the box 4.80 m starting from rest?

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Category:- Physics
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