chris342 chris342
  • 08-09-2017
  • Physics
contestada

An object (initially at rest) is dropped from a height h above the ground if it takes 4 seconds for the object to reach the ground, the height h is equal to

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LNO
LNO LNO
  • 08-09-2017
Since U=0,
h=1/2gt^2 (h= ut+1/2gt^2, U=0)
h=1/2*10*4*4
h=80m
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