what is the velocity of rain
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Answer:
What is the speed of falling raindrops?
March 2001
During a 1987 skydive, parachutist Gregory Robertson saw that fellow skydiver, Debbie Williams, had suffered a mid-air collision with a third parachutist. Williams, rendered unconscious by the blow, was hurtling towards the ground at speeds in excess of 100 mph. At 13,500 ft, Robertson was well above Williams when he started to dive towards her. He reached a speed of about 200 mph, and catching up with Ms. Williams in mid-air, he went into a spread-eagle position to slow down and match her speed. As they both descended rapidly, and with seconds to spare, Robertson opened her chute and then his own, saving her life. He had expertly controlled his speed by changing his air resistance and therefore his drag coefficient. Even during a headfirst dive, Robertson reached an ultimate speed that he could not exceed, called his terminal velocity. Just what is terminal velocity and in particular a raindrop’s terminal velocity?
Any mass is attracted to the Earth by the pull of gravity. Gravity accelerates all objects towards the ground at a specific rate. Without any other forces present, the speed of an object in free fall will increase the farther or longer it falls. However, air friction or air resistance also exerts a force on an object (raindrop) that opposes the weight force of gravity. The air resistance and weight force on the droplet couple together to determine the terminal velocity for a given object
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