Find the initial acceleration of a rocket if the astronauts on board experience

Question

Find the initial acceleration of a rocket if the astronauts on board experience nine times their normal weight during an initial vertical ascent. (Hint: In this exercise, the scale force is replaced by the normal force.)
m/s2

PRACTICE IT A woman weighs a fish with a spring scale attached to the ceiling of an elevator, as shown in the figures. While the elevator is at rest, she measures a weight of 41.5 N. (a) What weight does the scale read if the elevator accelerates upward at 2.10 m/s^2? N (b) What does the scale read if the elevator accelerates downward at 2.10 m/s^2, as in figure (b)? N (c) If the elevator cable breaks, what does the scale read? N EXERCISE HINTS: Find the initial acceleration of a rocket if the astronauts on board experience nine times their normal weight during an initial vertical ascent. (Hint: In this exercise, the scale force is replaced by the normal force.) m/s^2

Explanation / Answer

a)scale reading = 41.5+((41.5/9.81)*2.1) = 50.3838 N b)scale reading = 41.5-((41.5/9.81)*2.1) = 32.61621 N c)scale reading = 41.5-((41.5/9.81)*9.81) = 0 N

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