Question

A model rocket rises with constant acceleration to a height of 3.5 m, at which point its speed is 28.0 m/s? a. How much time does it take for the rocket to reach this height? b. What was the magnitude of the rocket's acceleration? c. Find the height of the rocket 0.20 s after launch. d. Find the speed of the rocket 0.20 s after launch.

          A model rocket rises with constant acceleration to a height of
3.5 m, at which point its speed is 28.0 m/s?
a. How much time does it take for the rocket to reach this
height?
b. What was the magnitude of the rocket's acceleration?
c. Find the height of the
rocket 0.20 s after launch.
d. Find the speed of the rocket 0.20 s after
launch.
        
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Added by Joseph P.

University Physics with Modern Physics
University Physics with Modern Physics
Hugh D. Young 14th Edition
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A model rocket rises with constant acceleration to a height of 3.5 m, at which point its speed is 28.0 m/s? a. How much time does it take for the rocket to reach this height? b. What was the magnitude of the rocket's acceleration? c. Find the height of the rocket 0.20 s after launch. d. Find the speed of the rocket 0.20 s after launch.
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Transcript

-
00:01 Hello, here a model rocket rises with a constant acceleration to the height of 3 .5 meters.
00:09 And at this point it has a speed of 28 meters per second.
00:13 First in question a, we have to determine how much time is needed to reach this point.
00:18 Height 1 is v1t1 over 2.
00:23 Then we can calculate this t1.
00:32 Let's do this.
00:38 That's 0 .25 seconds.
00:41 Now in question b we have to determine magnitude of the acceleration.
00:56 That's 112 meters per second...
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