A paraglider is flying horizontally at a constant speed.Assume that only two for

Question

A paraglider is flying horizontally at a constant speed.Assume that only two forces act on it in the vertical direction,its weight and a vertical lift force exerted on its wings by theair. The lift force has a magnitude of 1500 N. For both questions, take the upward directionto be the +y direction.
If the lift force should suddenly decrease to 800 N, what would be the vertical acceleration of theglider?
(answer in m/s2) A paraglider is flying horizontally at a constant speed.Assume that only two forces act on it in the vertical direction,its weight and a vertical lift force exerted on its wings by theair. The lift force has a magnitude of 1500 N. For both questions, take the upward directionto be the +y direction.
If the lift force should suddenly decrease to 800 N, what would be the vertical acceleration of theglider?
(answer in m/s2)

Explanation / Answer

when the glider is flying at constant speed, in verticaldirection, acceleration is zero and the lift force is equal to thegravitational force. F = mg mg = F = 1500N m = 1500N/g when the lift force F = 800N we have: F-mg = 800N - 1500N = -700N = ma a = -700N/m = -700N / 1500N/g = -4.57m/s2 the vertical acceleration is -4.57 m/s2 the negative sign mean dowmward.

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