Verified Solution • 2025–26 Session moderate

QNEET-2017-Ph-966: NEET 2017 Physics - Class 11 NEET-2017-Ph-966 Solution: Consider a drop of rain water having mass 1 g falling from a…

Consider a drop of rain water having mass 1 g falling from a height of 1 km. It hits the ground with a speed of 50 m

s^{-1}

. Take 'g' constant with a value 10 m

s^{-2}

. The work done by the (i) gravitational force and the (ii) resistive force of air is (i) 1.25 J (ii) -8.25 J (i) 100 J (ii) 8.75 J (i) 10 J (ii) -8.75 J (i) -10 J (ii) -8.25 J

Multiple Choice Options

A (i) 1.25 j (ii) $-$ _ 8.25 J
B (i) 100 j (ii) 8.75 J
C (i) 10 j (ii) $-$ _ 8.75 J
D (i) $-$ _ 10 j (ii) $-$ _ 8.25 J

Step-by-Step Verified Solution

From work-energy theorem, W g + W a = _ K.E or mgh + W a = 1 2 m v 2 _ 0 10 _ 3 _ 10 _ 10 3 + W a = 1 2 _ 10 _ 3 _ ( 50 ) 2 _ W a = _ 8.75 J which is the work done due to air resistance Work done due to gravity = mgh = 10 �3 _ 10 _ 10 3 = 10 J

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