demarijonmcneill demarijonmcneill
  • 02-03-2021
  • Physics
contestada

A coin is dropped in a 15.0 m deep well.

A)How long does it take the coin to hit the surface of the water?

Respuesta :

mberisso
mberisso mberisso
  • 03-03-2021

Answer:

About 1.75 seconds

Explanation:

We use the kinematic equation for free fall under the action of gravity:

[tex]h(t)=h_i -\frac{1}{2} g\,t^2\\0 = 15-\frac{1}{2} 9.8\,t^2\\t^2=\frac{15*2}{9.8} \\t=\sqrt{\frac{15*2}{9.8}} \\t\approx 1.75\,\,sec[/tex]

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