MHT CET 2024 Physics question
A bullet is fired on a target with velocity V. its velocity decreases from V to . When it penetrates 30cm in a target. Through what thickness it will penetrate further in the target before coming to rest?
Answer: (C)
Solution
Assume a constant retardation . First stage, using : , so , i.e. (per cm). Second stage, from speed to rest through distance : , so \dfrac{V^2/4}{2a}$
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