A fisherman and his young son are in a boat on a small pond. Both are wearing li

Question

A fisherman and his young son are in a boat on a small pond. Both are wearing life jackets. The son is holding a large helium filled balloon by a string. Consider each action below independently and indicate whether the level of the water in the pond, Rises, Falls, is Unchanged or Cannot tell.
Answers either R-Rises, F-Falls, U-Unchanged, C-Cannot Tell

(a)The fisherman knocks the tackle box overboard and it sinks to the bottom.

(b)The son gets in the water, looses his grip on the string, letting the balloon escape upwards.

(c)The fisherman lowers the anchor and it hangs one foot above the bottom of the pond.

(d)The son pops the helium balloon.

(e)The fisherman lowers himself in the water and floats on his back.

(f)The fisherman fills a glass with water from the pond and drinks it.

Explanation / Answer

A) F B) R (with balloon in hand the bouyant force of air decreases the weight of son but when he releases ballon in water his weight increases which will increase the water level) C) U D).R E) U F) U

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