71. The downward force on the balloon is mg and the upward force is F b = ρ out Vg . Newton’s second law (with m = ρ in V )leadsto ρ out Vg − ρ in Vg = ρ in Va = ⇒ µ ρ out ρ in − 1 ¶ g = a. The problem speciFes ρ out /ρ in =1 . 39 (the outside air is cooler and thus more dense than the hot air
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.