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23 Nov 2019
A test rocket is fired vertically upward from a well. A catapultgives it an initial speed of 81.0 m/s at ground level. Its enginesthen fire and it accelerates upward at 3.90 m/s^2 until it reachesan altitude of 930 m. At that point its engines fail, and therocket goes into free fall, with an acceleration of -9.80 m/s^2.(You will need to consider the motion while the engine is operatingseparate from the free-fall motion.)
a) How long is the rocket in motion above the ground? ______s
b)What is its maximum altitude? ______km
c) What is its velocity just before it collides with the Earth?_____m/s
thank you!
A test rocket is fired vertically upward from a well. A catapultgives it an initial speed of 81.0 m/s at ground level. Its enginesthen fire and it accelerates upward at 3.90 m/s^2 until it reachesan altitude of 930 m. At that point its engines fail, and therocket goes into free fall, with an acceleration of -9.80 m/s^2.(You will need to consider the motion while the engine is operatingseparate from the free-fall motion.)
a) How long is the rocket in motion above the ground? ______s
b)What is its maximum altitude? ______km
c) What is its velocity just before it collides with the Earth?_____m/s
thank you!
Hubert KochLv2
6 Jan 2019
