If an arrow is shot straight upward on the surface of the moon with initial velocity 60m/s, its height after t seconds is given by h(t) = 60t − 0.8t^2. At what time does the arrow reach its maximal height?

University Physics Volume 1
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ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter4: Motion In Two And Three Dimensions
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If an arrow is shot straight upward on the surface of the moon with initial
velocity 60m/s, its height after t seconds is given by
h(t) = 60t − 0.8t^2.

At what time does the arrow reach its maximal height?

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