JEE Main 2026 · 6 Apr · Shift 1 · Physics Q28

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PhysicsSingle correct+4 / -1Question 28 of 75

The rain drop of mass 1 g, starts with zero velocity from a height of 1 km. It hits the ground with a speed of 5 m/s. The work done by the unknown resistive force is ________ J.

(take $g=10$ m/s²)

−8.75

−8.35

−9.55

−9.98

Answer and worked solution

Official answer: D

Work-energy theorem. $W_g+W_r=\tfrac12mv^2$ :
$W_r=0.001\left(\tfrac12\cdot25-10\cdot1000\right)=-9.9875\text{ J}\approx-9.98\text{ J}.$

(D)

Topics:Work-energy theorem

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JEE Main 2026 · 6 Apr · Shift 1, Physics question 28