A 10 N box is dropped from a tall building, taking into account air resistance,

Question

A 10 N box is dropped from a tall building, taking into account air resistance, as the box falls the box will eventually reach a constant velocity, when the box is falling at a constant velocity what does this tell you about the drag force?

a) The drag force is greater than 10 N directed upward

b) The drag force is equal to 10 N directed downward

c) The drag force is equal to 10 N directed upward

d)The drag force is less than to 10 N directed upward

The drag force is greater than 10 N directed downward

Explanation / Answer

Body falling down with constant velocity means its acceleration is zero

so

Fnet = 0

Fdrag - W = 0

c) The drag force is equal to 10 N directed upward

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