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QNEET-2023-Ph-261: NEET 2023 Physics - Class 11 NEET-2023-Ph-261 Solution: A bullet from a gun is fired on a rectangular wooden block with …
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 . 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
Multiple Choice Options
- A 24 cm
- B 28 cm
- C 30 cm
- D 27 cm
Step-by-Step Verified Solution
B y v 2 = u 2 + 2 a s
( u 3 ) 2 = u 2 _ 2 a x
2 a x = u 2 _ u 2 9
2 ax = 8 u 2 9 ..... (1)
Similarly from starting
v 2 = u 2 + 2 a x
0 = u 2 _ 2 a x 2
2 ax 2 = u 2 ..... (2)
By ( 1 ) / ( 2 )
x x 2 = 8 9
24 x 2 = 8 9
x 2 = 27 cm