Exercise 2.A model rocket is fired vertically upward from rest. Its acceleration forthe first three seconds is a(t) = 60t, at which time the fuel is exhausted and it becomes afreely "falling" body. Fourteen seconds later, the rocket's parachute opens, and the (downward)velocity slows linearly to -8 ft/s in 5 s. The rocket then descend with constant velocity to theground.%3Da) Determine the position function s and the velocity function v (for all times t).b) At what time does the rocket reach its maximum height, and what is that height?c) At what time does the rocket land?

Name: Exercise 2.A model rocket is fired vertically upward from rest. Its a
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Description: Exercise 2.A model rocket is fired vertically upward from rest. Its acceleration forthe first three seconds is a(t) = 60t, at which time the fuel is exhausted and it becomes afreely "falling" body. Fourteen seconds later, the rocket's parachute open

Its acceleration for the first three-second is a (t) = 60t After 14 sec later the rocket's…

Answered: ds is a(t) = 60t, at which time the…

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ds is a(t) = 60t, at which time the fuel is exhausted ar Fourteen seconds later, the rocket's parachute opens, and y to -8 ft/s in 5 s. The rocket then descend with constan

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Chapter4: Motion In Two And Three Dimensions

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Exercise 2.
A model rocket is fired vertically upward from rest. Its acceleration for
the first three seconds is a(t) = 60t, at which time the fuel is exhausted and it becomes a
freely "falling" body. Fourteen seconds later, the rocket's parachute opens, and the (downward)
velocity slows linearly to -8 ft/s in 5 s. The rocket then descend with constant velocity to the
ground.
%3D
a) Determine the position function s and the velocity function v (for all times t).
b) At what time does the rocket reach its maximum height, and what is that height?
c) At what time does the rocket land?

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