A stone is thrown into the air with initial speed of 3m/s from the ground.
What time does it hit the ground? (Neglect air resistance)
The time elapsed as a stone was thrown and it hit the ground
"\\Delta t=2\\times \\frac{v_0}{g}\\\\\n=\\rm 2\\times\\frac{3.0\\: m\/s}{9.8\\: m\/s^2}=0.61\\: s"
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