from,
d = 1/2gt² - eqn for free falling object
12 = 1/2 * 9.8 * t²
24 = 9.8*t²
t = 1.56 s.
Answer:
<em>1</em><em>. </em><em>A body is said to be at rest if its position does not change with respect to its surroundings.</em>
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