The Montgolfier brothers (Joseph and Etienne) were eighteenth-century pioneers in hot-air ballooning. Had they had the appropriate instruments, they might have left us a record, like that shown in the figure below, of one of their early experiments. T graph shows their vertical velocity, v, with upward as positive. v (ft/min) 20 10 t (min) 10 20 30 40 50 60 -10 -20 (a) Over what intervals was the acceleration positive? Negative? The acceleration is positive The acceleration is negative

The Montgolfier brothers (Joseph and Etienne) were eighteenth-century pioneers in hot-air ballooning. Had they had the appropriate instruments, they might have left us a record, like that shown in the figure below, of one of their early experiments. T graph shows their vertical velocity, v, with upward as positive. v (ft/min) 20 10 t (min) 10 20 30 40 50 60 -10 -20 (a) Over what intervals was the acceleration positive? Negative? The acceleration is positive The acceleration is negative

Name: (c) At what time was the upward acceleration greatest?(d) At what tim
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Description: (c) At what time was the upward acceleration greatest?(d) At what time was the deceleration greatest?(e) What might have happened during this flight to explain the answer to part (d)?(f) This particular flight ended on top of a hill. What was the he

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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Question

(c) At what time was the upward acceleration greatest?
(d) At what time was the deceleration greatest?
(e) What might have happened during this flight to explain the answer to part (d)?
(f) This particular flight ended on top of a hill. What was the height of the hill above the starting point?

The Montgolfier brothers (Joseph and Etienne) were eighteenth-century pioneers in hot-air ballooning. Had they had the
appropriate instruments, they might have left us a record, like that shown in the figure below, of one of their early experiments. The
graph shows their vertical velocity, v, with upward as positive.
v (ft/min)
20
10
t (min)
10
30
40
50
60
-10
-20
(a) Over what intervals was the acceleration positive? Negative?
The acceleration is positive
The acceleration is negative
(b) What was the greatest altitude achieved, and at what time?
20

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