Homework SourseOn October 21 2001 Ian Ashpole of the United Kingdom achieve
On October 21, 2001, Ian Ashpole of the United Kingdom achieved arecord altitude of 3.35 km (11 000 ft) powered by 600 toy balloonsfilled with helium. Each filled balloon had a radius ofabout 0.47 m and anestimated mass of0.34 kg.
(a) Estimate the total buoyant force on the 600 balloons.
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(b) Estimate the net upward force on all 600 balloons.
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(b) Estimate the net upward force on all 600 balloons.
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(a) Estimate the total buoyant force on the 600 balloons.
N
(b) Estimate the net upward force on all 600 balloons.
N
N
(b) Estimate the net upward force on all 600 balloons.
N
Solution
a) The buoyant force acting on the balloon
FB = 600*(air Vg)
V = volume of ballloon =(4/3)r3
b) The force acting on the ballon
F = FB (When a body floats , the magnitudeof the buoyant force on the body is equal to gravitationalforce.
= 600*(air Vg)
