The key to solving this problem is to determine how long the block was in the air before it hits the ground. It is assumed in problems of this type that motion is the x- and y-directions are independent and that air resistance is ignored.

As the block leaves the table it has zero velocity in the y-direction. Due to the acceleration of gravity it will start accelerating is it falls.

The time it...

(The entire section contains 211 words.)

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