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15 June, 05:14

Phils mass is 90 kg experiences 200N of air resistance. What is the acceleration of his fall?

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  1. 15 June, 07:55
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    - - The gravitational force on Phil is (90kg) x (9.8 m/s²) = 882 Newtons DOWN.

    - - The force of air resistance on Phil is 200N UP.

    - - If these are the only forces acting on Phil, then the NET force on him is

    (882 N down) + (200 N up) = 682 N down.

    Newton revealed that F = m a. From this, we also know that a = F / m.

    Acceleration = (682 N down) / (90 kg)

    Acceleration = (682 / 90) (N/kg) down

    Acceleration = 7.58 m/s² down
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