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August 28, 2014

Homework Help: physics

Posted by john on Sunday, January 22, 2012 at 1:21am.

A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth.
(a) Find the rocket's velocity and position at the end of 4.26 s.
vb = m/s
yb = m

(b) Find the maximum height the rocket reaches.
m

(c) Find the velocity the instant before the rocket crashes on the ground.
m/s

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