Yet Another M1 Question I'm Stuck On :( Watch

Bakasplitz
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Report Thread starter 7 years ago
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Ahhh~ going through M1 questions in my textbook is starting to stress me out when i can't seem to get around a question even with looking back at examples D:

but for this question i don't even know what to use?
F=ma?

A hot-air balloon, its occupants and ballast have total mass 2000kg. The balloon is travelling horizontally with constant velocity. The occupants release 100kg of ballast. Neglecting air resistance, find the magnitude of the acceleration of the balloon.

do i use F=ma to solve this question? D:
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ttoby
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What you need to do here is consider the forces acting on the balloon - lift and weight. When the ballast is removed, the weight is reduced so the net force changes from zero to some value upwards. It might help to draw a diagram:
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Bakasplitz
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(Original post by ttoby)
What you need to do here is consider the forces acting on the balloon - lift and weight. When the ballast is removed, the weight is reduced so the net force changes from zero to some value upwards. It might help to draw a diagram:
Thanks alot dude~ managed to work it out now ^^
i completely forgot about taking lift into account (:
diagrams really help ^^ thanks [:
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