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vmedina89
vmedina89 vmedina89
  • 04-05-2016
  • Chemistry
Answered

A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 313.6 meters B. 78.4 meters C. 1,254.4 meters D. 39.2 meters

Verified Answer :

Anonymous Anonymous
  • 17-05-2016

The correct answer is letter A. We use the formula,  v=vo + at to get the answer.


v=vo + at 
v=0 + (9.8)(8) 
v=78.4 

y=1/2(vo + v)t 
y=1/2(78.4)(8) 
y=1/2(627.2) 
y=313.6m 

Answer Link
mahyahm23 mahyahm23
  • 08-01-2019

The answer will be A 313.6

Answer Link

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