JEE Advanced 2025 Physics question
A projectile of mass 200 g is launched in a viscous medium at an angle 60° with the horizontal, with an initial velocity of 270 m/s. It experiences a viscous drag force where the drag coefficient c = 0.1 kg/s and is the instantaneous velocity of the projectile. The projectile hits a vertical wall after 2 s. Taking e = 2.7, the horizontal distance of the wall from the point of projection (in m) is
Answer: 170
Solution
Horizontally only the drag acts: , and . Here $
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