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

-- 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

frequency or wavelenth of em radiation in a vacuum

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hope this