# Ideal Ball Projectile Motion

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A ball is thrown directly downward, with an initial speed of 8.50 m/s, from a height of 31.0 m. After what time interval does the ball strike the ground?

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#### Solution Preview

Use projectile motion equation:

Y = (Vo)(t) - (1/2)(g)(t^2)

where Y is the distance, Vo is the initial velocity, t is the time and g is ...

#### Solution Summary

Kinematic solution to classical physics question.

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