1.

Why parachute helps in reducing speed of the person jumped from the plane?

Answer»

Parachute decrease the speed this statement is ABSOLUTELY right.
now let me explain why this happens...
when parachute opens it doesn't let pass LOWER air through the parachute and that air apply force on parachute in opposite direction.
ONE force is applied by gravity while other in opposite of gravity by air,both are opposite so one reduce another since force of air is not as MUCH as gravity so it only cancel out MAJOR portion of gravitational force not whole,otherwise we will stop at one place.



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