NEET 2023 Physics Kinematics MCQ Question
A bullet from a gun is fired on a rectangular wooden block with velocity u. When bullet travels 24 cm through the block along its length horizontally, velocity of bullet becomes u/3. Then it further penetrates into the block in the same direction before coming to rest exactly at the other end of the block. The total length of the block is:
24 cm
28 cm
30 cm
27 cm
Correct Answer
Detailed Explanation
The bullet decelerates uniformly. Using the equation v^2 = u^2 + 2as, where v = 0, u = u/3, and s = 24 cm, we find the deceleration a. Then, using the same equation for the total length, we find s_total = 30 cm.
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