To find: The velocity of the ball when .
The velocity of the ball when is .
The height (in feet) of the ball after t seconds is .
The position function is, .
The derivative is the velocity of the particle at time .
Obtain the velocity of the ball when time .
Take the position function and substitute time in equation (1)
Factorize the numerator,
Cancel the common term from both the numerator and the denominator,
Simplify further and obtain the velocity as follows.
Thus, the velocity of the ball at time is .
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