Question
A light spring of length I and spring constant k is placed vertically on a table. A small ball of mass m falls on it. The height h from the surface of the table at which the ball will have the maximum velocity is
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[b] Equation of motion for the ball at the moment when the spring is compressed by Δx,ma=mg−kΔx As long as the acceleration of the ball is positive, its velocity increases. At the moment, when the acceleration vanishes, the velocity of the ball attains the maximum value. The spring is then compressed by an amount Δl given by mg−kΔl=0 or Δl=mgk So, when ball attains the maximum velocity, its height from the table h=l−mgk
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Question Text | A light spring of length I and spring constant k is placed vertically on a table. A small ball of mass m falls on it. The height h from the surface of the table at which the ball will have the maximum velocity is |
Answer Type | Text solution:1 |
Upvotes | 150 |