All Problems

The Fundamental Equation of Dynamics

Problem 1.59

An aerostat of mass mm starts coming down with a constant acceleration ww. Determine the ballast mass to be dumped for the aerostat to reach the upward acceleration of the same magnitude The air drag is to be neglected.

Reveal Answer
Δm=2mw/(g+w)\Delta m=2 m w /(g+w)