Pooh Bear has a mass of 354 g and wishes to float up to the top of the honey tre

Question

Pooh Bear has a mass of 354 g and wishes to float up to the top of the honey tree. He figured if Christopher Robin rubs a balloon on his head he can transfer 10 trillion electrons to each balloon. If Christopher Robin holds one balloon and Pooh holds the other, how high can Pooh levitate? Treat both balloons as point charges. [the answer is 82 micrometers above Christopher Robin's balloon. I'm getting stuck in the word problem & can't picture what it's even asking...] Pooh Bear has a mass of 354 g and wishes to float up to the top of the honey tree. He figured if Christopher Robin rubs a balloon on his head he can transfer 10 trillion electrons to each balloon. If Christopher Robin holds one balloon and Pooh holds the other, how high can Pooh levitate? Treat both balloons as point charges. [the answer is 82 micrometers above Christopher Robin's balloon. I'm getting stuck in the word problem & can't picture what it's even asking...]

Explanation / Answer

charge on each ballon q= e x 1013 C= 1.6 x 10-19 x 1013 = 1.6 x 106 C

here the electrostatic force would balance the weight

kq2 /r2 = mg

r2 =kq2 /mg = 0.00664

r = 0.815m = 81.5 mm

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