Question

1. 0 / 1 points details

a rock is dropped from rest. how fast is it going after it has been falling for 1.4 s?
x m/s
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Explanation:

Step1: Identify the kinematic equation

The equation for final velocity \(v = v_0+at\). Since the rock is dropped from rest, \(v_0 = 0\) m/s and \(a = g= 9.8\) m/s² (acceleration due to gravity).

Step2: Substitute the values

Substitute \(v_0 = 0\), \(a = 9.8\) m/s² and \(t = 1.4\) s into the equation \(v=v_0 + at\). So \(v=0+(9.8\times1.4)\).

Step3: Calculate the value

\(v = 9.8\times1.4=13.72\) m/s.

Answer:

\(13.72\)