1.

Air is a _________ fluid, it exerts force on a moving object, and when a person in free fall reaches a speed of about 180 ft/s (120 nules per hour), the air resistance force is equal to the force of gravity, and one stops accelerating. This is known as terminal velocity.

A. tNon viscous
B. tViscous
C. tConstant
D. tGravity free
Answer» C. tConstant


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