9. What force can help a skydiver falling to earth with a parachute?
a friction
b. air resistance
c. water tension
d force of graffiti
a friction
b. air resistance
c. water tension
d force of graffiti
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Answer:
B
Explanation:
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Answer:
B.Air resistance
Explanation:
An open parachute increases the cross-sectional area of the falling skydiver and thus increases the amount of air resistance which he encounters (as observed in the animation below). Once the parachute is opened, the air resistance overwhelms the downward force of gravity
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