Question

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

Answer 1

Since coin is dropped, initial velocity of coin must be zero.
∴ s =
`(1)/(2) a t^(2)`
∴ s =
`(1)/(2)`×9.8×5²
= 122.5m ~ 123m