Nataliacarrillo635
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A firewoman dropped a person onto the safety net. Right before the person hit the net he had a
velocity of 11.2 m/s and 1800 J of kinetic energy. What was the mass of the person?

Respuesta :

Answer:

28.699

Explanation:

KE + 1/2 (mv *mv)

1800 = 1/2 (125.44)

14.349 = 2m

m = 28.699

The mass of the person is [tex]28.7kg[/tex]

Kinetic energy:

It is a property of a moving object or particle and depends on its motion also on its mass.

  • The expression is given as,

                 [tex]K.E=\frac{1}{2}mv^{2}[/tex]

  • Where m is mass and v is velocity of object.
  • Given that, Kinetic energy is [tex]1800J[/tex], velocity [tex]v=11.2m/s[/tex]
  • Substitute values in above expression.

             [tex]1800=\frac{1}{2}*m*(11.2)^{2} \\\\m=\frac{1800*2}{125.44}=28.7kg[/tex]

The mass of the person is [tex]28.7kg[/tex]

Learn more about the mass and velocity here:

https://brainly.com/question/846946

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