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16 January, 11:37

A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 51.1 kg and air resistance exerts a total upward force of 657 N on her and her parachute. What is the magnitude of the acceleration of the parachutist?

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  1. 16 January, 11:56
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    The resultant force will be equal to difference of her downward force, her weight, and the upward force, the air resistance.

    Fnet = 657 - 51.1 x 9.81

    = 149.7 N

    F = ma

    a = F / m

    a = 149.7/51.1

    a = 2.93 m/s²
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