curryball3035
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You serve a volleyball with a mass of 2.1kg. The ball leaves your hand with a speed of 30m/s. The ball has _____________ energy. Calculate it.

Sagot :

  • Mass=m=2.1kg
  • Velocity=v=30m/s

[tex]\\ \rm\Rrightarrow K.E=\dfrac{1}{2}mv^2[/tex]

[tex]\\ \rm\Rrightarrow K.E=\dfrac{1}{2}(2.1)(30)^2[/tex]

[tex]\\ \rm\Rrightarrow K.E=\dfrac{1}{2}(2.1)(900)[/tex]

[tex]\\ \rm\Rrightarrow K.E=450(2.1)[/tex]

[tex]\\ \rm\Rrightarrow K.E=945J[/tex]

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