A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water? (use g = 10 m/s²) A) 14 m B) 16 m C) 24 m D) 20 m E) 12 m

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Quizplus · Accepted Answer

The time it takes for the rock to fall 20 m can be calculated using the formula for free fall: $ t = \sqrt{\frac{2h}{g}} = \sqrt{\frac{2 \times 20}{10}} = 2 $ seconds. The horizontal distance is then $ \text{velocity} \times \text{time} = 10 \, \text{m/s} \times 2 \, \text{s} = 20 \, \text{m} $.

A Girl Throws a Rock Horizontally, with a Velocity of 10