The vertical component of the acceleration of a sailplane is
The vertical component of the acceleration of a sailplane is zero when the air pushes up against its wings with a force of 3.0 kN.
(a) Assuming that the only forces on the sailplane are that due to gravity and that due to the air pushing against its wings, what is the gravitational force on the Earth due to the sailplane?
(b) If the wing stalls and the upward force decreases to 2.0 kN, what is the acceleration of the sailplane?
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