$\"\"$

\

The acceleration due to gravity is $\"\"$ meters/sec.

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The initial velocity of object is $\"\"$ meters/sec.

\

$\"\"$ .

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Acceleration of a object is rate of change in velocity $\"\"$ .

\

Velocity is $\"\"$ .

\

$\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

The position of a object at time $\"\"$ is $\"\"$ .

\

Velocity of a object is rate of change in position $\"\"$ .

\

Position at time $\"\"$ is $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

The initial height of object is $\"\"$ feet.

\

$\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

Substitute $\"\"$ .

\

$\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

The object reaches the deepest point $\"\"$ .

\

The height of the object is $\"\"$ meters.

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The velocity at deepest point is $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$ .

\

The height of a rock is $\"\"$ .

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ sec.

\

$\"\"$

\

The height of a rock is $\"\"$ .

\

$\"\"$ sec.