A model rocket is launched from the ground at rest. The acceleration of the rocket is å = 90 ŷ. After 1.5 m seconds, the rocket fuel is expended, and the acceleration of the rocket returns to à = -9.8 ŷ . a) Find the velocity of the rocket just as the fuel is expended (Answer: 135ŷ“) b) Find the height of the rocket just as the fuel is expended (Answer: 101ŷ m) c) How long does it take the rocket to reach maximum height after the fuel is expended? (Answer: 13.8 s) d) What is the maximum height of the rocket? (Answer: 1031 m) e) What is the impact velocity of the rocket as it hits the ground? (Answer: –142ý “)
A model rocket is launched from the ground at rest. The acceleration of the rocket is å = 90 ŷ. After 1.5 m seconds, the rocket fuel is expended, and the acceleration of the rocket returns to à = -9.8 ŷ . a) Find the velocity of the rocket just as the fuel is expended (Answer: 135ŷ“) b) Find the height of the rocket just as the fuel is expended (Answer: 101ŷ m) c) How long does it take the rocket to reach maximum height after the fuel is expended? (Answer: 13.8 s) d) What is the maximum height of the rocket? (Answer: 1031 m) e) What is the impact velocity of the rocket as it hits the ground? (Answer: –142ý “)
College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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Can you please help me with parts d and e?
Transcribed Image Text:A model rocket is launched from the ground at rest. The acceleration of the rocket is à = 90 ŷ
m
After 1.5
s2
seconds, the rocket fuel is expended, and the acceleration of the rocket returns to å = -9.8 ŷ
a) Find the velocity of the rocket just as the fuel is expended (Answer: 135ŷ“)
b) Find the height of the rocket just as the fuel is expended (Answer: 101ŷ m)
c) How long does it take the rocket to reach maximum height after the fuel is expended? (Answer: 13.8 s)
d) What is the maximum height of the rocket? (Answer: 1031 m)
e) What is the impact velocity of the rocket as it hits the ground? (Answer: -142ý)
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