SOLUTION: an airplane requires 20s and 400 m of runway to become airborne, starting from rest. What is its velocity when it leaves the ground?
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Question 1104710: an airplane requires 20s and 400 m of runway to become airborne, starting from rest. What is its velocity when it leaves the ground?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
an airplane requires 20s and 400 m of runway to become airborne, starting from rest. What is its velocity when it leaves the ground?
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If you mean it accelerates for 20 seconds and moves 400 meters:
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Assuming uniform acceleration:
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Its avg speed = 400/20 = 20 m/sec
The speed at 400 meters = 40 m/sec
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Speed, not velocity.
Velocity is a vector including speed and direction.
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