InterviewSolution
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InterviewSolution
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A bullet, moving with a speed of `150(m)//(s)`, strikes a wooden plank. After passing through the plank, its speed becomes `125(m)//(s)`. Another bullet of the same mass and size strikes the plank with a speed of `90(m)//(s)`. Its speed after passing through the plank would beA. `25(m)//(s)`B. `35(m)//(s)`C. `50(m)//(s)`D. `70(m)//(s)` |
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Answer» Correct Answer - B `(1)/(2)m(150)^2=(1)/(2)m(125)^2+Rd` .(i) `(1)/(2)m(90)^2=(1)/(2)mv^2+Rd` .(ii) `(150)^2-(125)^2=(90)^2-v^2` `v=35(m)//(s)` |
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