A balloon is filled with air. The mass of the air in the balloon is 10 gr. A small hole is made to the balloon and released. The balloon moves up with an average speed of 5 cm/s and shrinks completely in 5 seconds. Find the average form acting on the balloon.

A balloon is filled with air. The mass of the air in the balloon is 10

1.	A balloon is filled with air. The mass of the air in the balloon is 10 gr. A small hole is made to the balloon and released. The balloon moves up with an average speed of 5 cm/s and shrinks completely in 5 seconds. Find the average form acting on the balloon.
A.	10 dynes
B.	5 dynes
C.	15 dynes
D.	20 dynes
Answer» B. 5 dynes

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A balloon is filled with air. The mass of the air in the balloon is 10 gr. A small hole is made to the balloon and released. The balloon moves up with an average speed of 5 cm/s and shrinks completely in 5 seconds. Find the average form acting on the balloon.

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