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A coin dropped from the top of a precipice takes 5.00 s to hit the ground. How high is the precipice?
A) 49.1 m
B) 245 m
C) 123 m
D) 25.5 m

Respuesta :

Since coin is dropped, initial velocity of coin must be zero.
∴ s = [tex] \frac{1}{2} a t^{2} [/tex]
 ∴ s     = [tex] \frac{1}{2} [/tex]×9.8×5²
           = 122.5m ~ 123m

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