If the mass of a balloon is 300 kg and the lift force provided by the atmosphere is 3300 N, what is the net force on the balloon?

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Answer 1 · 2018-05-28T08:39:06

#"the solution is shown below."#

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Suppose P is the center of gravity.
There are two forces acting on the P point. (These are symbolized as blue and red vectors.)
You see that the vectors are opposite.
To find the net force, we need to subtract the red vector from the blue vector
Net force tells how balloons will behave.
If the net force is zero, the balloon is either stationary or has a constant velocity (Newton's first law).
If the net force is greater than zero, the balloon has a constant acceleration (Newton's second law).
weight of balloon=m*g=300.9,81=2943 Newtons
lifting force=3300 Newtons
Net force=lifting force-weight of balloon
Net force=3300-2943=357 Newtons.