When air is heated at ground level, it rises in the form of a thermal capable of lifting a
sailplane for hours because the air _________ as it rises
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cools
, "When air accelerates, _________. When air decelerates,_________."
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pressure decreases; pressure increases
Newtons first law
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An object at rest stays at rest and an object in motion stays in motion with
the same speed and in the same direction unless acted upon by an
unbalanced force. (law of intertia)
artificial forces of flight
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thrust and lift
opposite force of lift
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gravity
Newtons second law
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Force equals mass times acceleration
Balloons can fly because of
sailplane for hours because the air _________ as it rises
Give this one a try later!
cools
, "When air accelerates, _________. When air decelerates,_________."
Give this one a try later!
pressure decreases; pressure increases
Newtons first law
, Give this one a try later!
An object at rest stays at rest and an object in motion stays in motion with
the same speed and in the same direction unless acted upon by an
unbalanced force. (law of intertia)
artificial forces of flight
Give this one a try later!
thrust and lift
opposite force of lift
Give this one a try later!
gravity
Newtons second law
Give this one a try later!
Force equals mass times acceleration
Balloons can fly because of
