An object moving due to gravity can be described by the motion equation y = yo + vot –gt?, where t is time, y is the height at that time, yo is the initial height (at t= 0), vo is the initial velocity, and g = 9.8 m/s² (the acceleration due to gravity). If you stand at the edge of a cliff that is 75 m high and throw a rock directly up into the air with a velocity of 20 m/s, at what time will the rock hit the ground? (Note: The Quadratic Formula will give two answers, but only one of them is reasonable.) Express your answer in seconds.

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Scalars and Vectors

Scalars and Vectors are the classification of physical quantities that are used to denote various terms in physics.