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August 20, 2014

Homework Help: Physics

Posted by Sasha on Sunday, January 3, 2010 at 2:20pm.

I found the first three parts of the question but I can't figure out part d.


The instruments attached to a weather balloon in the figure below have a mass(m) of 5.5 kg. The balloon is released and exerts an upward force(F) of 109 N on the instruments.

(a) What is the acceleration of the balloon and instruments?
10.02m/s^2

(b) After the balloon has accelerated for 10 s, the instruments are released. What is the velocity of the instruments at the moment of their release?
100.2 m/s

(c) What net force acts on the instruments after their release?
53.9N

(d) When does the direction of the instrument's velocity first become downward?
This is the one I can't figure out

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