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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
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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

User Palash Roy
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7.9k points

2 Answers

3 votes

The answer will be A 313.6

User Whyleee
by
8.3k points
4 votes
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
User Guildem
by
8.2k points
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