MHT CET 2025 Physics question
A stationary object at 4C and weighing 3.5 kg falls from a height of 2000 m on snow mountain at 0C. If the temperature of the object just before hitting the snow is 0C and the object comes to rest immediately then the quantity of ice that melts is (Acceleration due to gravity = 10 m/s, Latent heat of ice = 3.5 x 10 J/kg)
Answer: (C)
Solution
The object reaches the snow at 0 degrees C, so its temperature stays the same and the only energy dissipated is its mechanical energy, which is converted to heat when it stops: $E = mgh = 3.5×10×2000 =
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