The stone was thrown vertically down from a 40m high cliff. Before the fall, the stone had a speed of 30 m / s.
| November 28, 2020 | education
The stone was thrown vertically down from a 40m high cliff. Before the fall, the stone had a speed of 30 m / s. How long did the stone fall? Air resistance is negligible.
Given: height 40m, speed 30 m / s, acceleration of gravity 10 m / s2
Can be solved by the formula: V = V0 + gt
30 = 0 + 10t
10t = 30
t = 30/10
t = 3 s
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