11. What the difference between the fall of parachute on the earth and that on moon what is the effect of gravity on falling object

Parachute acquires upthrust of air so fall is with uniform velocity. Upthrust of air is not acted on parachute and falls with acceleration equal to acceleration due to gravity. Free-fall is not experienced.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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