Find the speed of a 5.6-kg bowling ball that has a kinetic energy of 25.2 J.

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kathynellmarie kathynellmarie

21-12-2015
Physics

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Find the speed of a 5.6-kg bowling ball that has a kinetic energy of 25.2 J.

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AL2006 AL2006 · Answer 1 · 2015-12-21T01:08:44+01:00

      Kinetic energy = (1/2) (mass) (speed)²

         25.2 J      = (1/2) (5.6kg) (speed)²

Divide each side
by (2.8 kg) :    25.2 J / 2.8 kg =   speed²

Take the square root
of each side:    speed = √(9 m²/sec²)

          = 3 m/s .