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In physics it is shown that the
height s of a ball thrown straight up with an initial speed of
96 ft/sec from ground level is
where t is the elapsed time that the ball is in the air.
(a) When does the ball strike the ground? That is, how long
is the ball in the air? (b) What is the average speed of the ball from to
(c) What is the instantaneous speed of the ball at time t?
(d) What is the instantaneous speed of the ball at
(e) When is the instantaneous speed of the ball equal to
zero?
(f) How high is the ball when its instantaneous speed equals
zero?
(g) What is the instantaneous speed of the ball when it strikes
the ground?
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