Question: A rock thrown vertically upward from the surface of the moon at a velocity of 24 m / sec (about 86 km / h) reaches

A rock thrown vertically upward from the surface of the moon at a velocity of 24 m / sec (about 86 km / h) reaches a height of s = 24t - 0.8t² m in t sec.
a. Find the rock’s velocity and acceleration at time t.

b. How long does it take the rock to reach its highest point?

c. How high does the rock go?

d. How long does it take the rock to reach half its maximum height?

e. How long is the rock aloft?

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