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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. 1,254.4 meters B. 39.2 meters C. 78.4 meters D. 313.6 meters
A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. The ledge is 313.6 meters tall. Solution: h = 0.5(-9.8t^2) + v_0t + h_0 0 = -4.9(8)^2 + 0 + h_0 h_0 = 64 * 4.9 = 313.6 meters.
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Asked 10/8/2018 12:01:42 PM
Updated 174 days ago|6/11/2020 11:45:11 PM
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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. The ledge is 313.6 meters tall.

Solution:
h = 0.5(-9.8t^2) + v_0t + h_0
0 = -4.9(8)^2 + 0 + h_0
h_0 = 64 * 4.9
= 313.6 meters.
Added 174 days ago|6/11/2020 11:45:11 PM
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