Look at the diagrams below.

A sheet of paper and a crumpled paper are thrown down from the same height and time is noted. Answer the following questions.

(a ) Will the time taken to reach the bottom of the container be the same for the sheet of paper and crumpled paper ? Why ? Explain giving reason.

(b) What will happen in case (ii) ?

 [a] No, the crumbled pappper will land in less time because the area of the crumbled papper is less thant the area of the sheet of the papper. We know that the formula of pressure = Thrust/area. In a sheet of papper the bottom area is more than the bottom area of crumbled papper, that is why the pressure applied on sheet of papper will be less than on the crumbled papper.

         If you are wondering the 'g' [ acc. due to dravity] is same on all objects irrelevant of mass or its area and that the sheet of papper and the crumbled papper should fall at the same time, then you should know this applies in a vaccum. In Earth because of air pressure, the sheet floats while the crumbled papper falls

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