Kylamolina
contestada

A man weighing 370 kg runs at 5 m/s into a brick wall. Assuming he slows to a speed of zero m/s in .01 seconds, what force does the wall exert on his face?

Respuesta :

  • Initial velocity=u=5m/s
  • Final velocity=v=0m/s
  • Time=t=0.01s
  • Mass=m=370kg

[tex]\\ \bull\tt\longmapsto F=ma[/tex]

[tex]\\ \bull\tt\longmapsto F=m\dfrac{v-u}{t}[/tex]

[tex]\\ \bull\tt\longmapsto F=370\times \dfrac{0-5}{0.01}[/tex]

[tex]\\ \bull\tt\longmapsto F=370\times \dfrac{-5}{0.01}[/tex]

[tex]\\ \bull\tt\longmapsto F=370\times (-500)[/tex]

[tex]\\ \bull\tt\longmapsto F=-185000N[/tex]

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