Question

josh has a heliun-filled balloon. he wants to calculate the speed of his balloon as it raises to the ceiling. What two measuremnets should he take to calculate the average speed of his balloon

Answer 1

Answer: Two essential measurements to calculating average speed are distance and time.

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Answer 2

Answer:

Neglecting baloom changes in volume and shape due to pressure

Fa=Vb*(Dw-Da)*g

Fa=Vb*Da*ac+Ab*Sb*k

Fa=acting force Vb=baloom volume Dw=water density Da=air density

ac=up acceleration Ab=baloom area Sb=baloom speed k=friction factor

Sb=Integration of (ac*t) from t=0 to t as ac is decreasing with Sb

ac= g*(Dw-Da)/Da-Ab*Sb*k/(Da*Vb)

If baloom shape and volume are affected by pressure k, Vb and Ab will change with time also,

Explanation:

Since the speed would change because the balloon size would change as would buoyant force, I’m guessing you’re looking for an average speed.

So, I would measure the depth from which the balloon is being released, release the balloon and time the ascent.

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