TS EAMCET · Physics · Motion In One Dimension
A bullet enters a wooden block with velocity \(120 \mathrm{~m} / \mathrm{s}\). The bullet travels \(1.5 \mathrm{~s}\) in the block before its velocity reduces to zero due to resistance force which is proportional to the square root of the velocity. The distance travelled by the bullet in the wooden block is
- A \(10 \mathrm{~m}\)
- B \(90 \mathrm{~m}\)
- C \(25 \mathrm{~m}\)
- D \(40 \mathrm{~m}\)
Answer & Solution
Correct Answer
(B) \(90 \mathrm{~m}\)
Step-by-step Solution
Detailed explanation
Given, velocity of bullet, \(u=120 \mathrm{~m} / \mathrm{s}\) and \(t=1.5 \mathrm{~s}\) If deceleration of bullet inside the block is \(a\). Then from the first equation of motion, \(v=u-a t\)…
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