MHT CET 2023 Physics question
A small steel ball is dropped from a height of 1.5 m into a glycerine jar. The ball reaches the bottom of the jar 1.5 second after it was dropped. If the retardation is 2.66 m/s, the height of the glycerine in the jar is about (acceleration due to gravity g = 9.8 m/s)
Answer: (C)
Solution
First the ball falls freely through 1.5 m, so its speed on entering the glycerine is given by (). In the glycerine it is retarded uniformly at and comes to rest at the bottom of the jar, so and the
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