(2) A model rocket rises vertically from rest with a constant acceleration of 3.23 m/s² until it runs out offuel at an altitude of 948 m. Neglect air resistance and take upwards as the positive direction for positionand velocity.(a) What maximum altitude does the rocket reach? (answer: 1260 m)(b) How much time does the rocket take to reach its maximum altitude? (answer: 32.3 s)(c) What is the velocity of the rocket at the moment it hits the ground? (answer: -157 m/s)(d) What is the total flight time of the rocket from the moment it is launched until the moment it hits theground? (answer: 48.3 s)(3) A hot air balloon is rising at a constant speed of 2.14 m/s. One of the passengers, a physics professor,has left his brain on the ground. A concerned student tosses the brain straight upward with an initial speedof 10.23 m/s, hoping the professor will catch it. The professor is unable to catch his brain on its way up butis able to catch it on its way back down. If the professor is 2.56 m above the student's hand at the instanthis brain leaves the student's hand, what is the elapsed time between the brain leaving the student's handand the professor catching the brain? (answer: 1.22 s)

(2) A model rocket rises vertically from rest with a constant acceleration of 3.23 m/s² until it runs out of fuel at an altitude of 948 m. Neglect air resistance and take upwards as the positive direction for position and velocity. (a) What maximum altitude does the rocket reach? (answer: 1260 m) (b) How much time does the rocket take to reach its maximum altitude? (answer: 32.3 s) (c) What is the velocity of the rocket at the moment it hits the ground? (answer: -157 m/s) (d) What is the total flight time of the rocket from the moment it is launched until the moment it hits the ground? (answer: 48.3 s)

(2) A model rocket rises vertically from rest with a constant acceleration of 3.23 m/s² until it runs out of fuel at an altitude of 948 m. Neglect air resistance and take upwards as the positive direction for position and velocity. (a) What maximum altitude does the rocket reach? (answer: 1260 m) (b) How much time does the rocket take to reach its maximum altitude? (answer: 32.3 s) (c) What is the velocity of the rocket at the moment it hits the ground? (answer: -157 m/s) (d) What is the total flight time of the rocket from the moment it is launched until the moment it hits the ground? (answer: 48.3 s)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Distance and Speed

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Question

(2) A model rocket rises vertically from rest with a constant acceleration of 3.23 m/s² until it runs out of
fuel at an altitude of 948 m. Neglect air resistance and take upwards as the positive direction for position
and velocity.
(a) What maximum altitude does the rocket reach? (answer: 1260 m)
(b) How much time does the rocket take to reach its maximum altitude? (answer: 32.3 s)
(c) What is the velocity of the rocket at the moment it hits the ground? (answer: -157 m/s)
(d) What is the total flight time of the rocket from the moment it is launched until the moment it hits the
ground? (answer: 48.3 s)
(3) A hot air balloon is rising at a constant speed of 2.14 m/s. One of the passengers, a physics professor,
has left his brain on the ground. A concerned student tosses the brain straight upward with an initial speed
of 10.23 m/s, hoping the professor will catch it. The professor is unable to catch his brain on its way up but
is able to catch it on its way back down. If the professor is 2.56 m above the student's hand at the instant
his brain leaves the student's hand, what is the elapsed time between the brain leaving the student's hand
and the professor catching the brain? (answer: 1.22 s)

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