iran-konkur 2016 Q164

iran-konkur · Other · konkur-riazi_1395_specialized Work done and energy Work done by gravity in specific scenarios
164. According to the figure below, a object of mass $250\,\text{g}$ is placed on top of a spring whose spring constant is $2.5\,\dfrac{\text{N}}{\text{cm}}$, is released, and after hitting the spring, the spring compresses $12\,\text{cm}$. The work done by gravity on the object from the moment of release to the moment the spring reaches maximum compression is how many joules? (Air resistance is negligible and $g = 10\,\dfrac{\text{m}}{\text{s}^2}$.)
[Figure: A block resting on a spring attached to the ground]
  • [(1)] $0.3$
  • [(2)] $1.2$
  • [(3)] $1.8$
  • [(4)] $3.6$

\textbf{164.} According to the figure below, a object of mass $250\,\text{g}$ is placed on top of a spring whose spring constant is $2.5\,\dfrac{\text{N}}{\text{cm}}$, is released, and after hitting the spring, the spring compresses $12\,\text{cm}$. The work done by gravity on the object from the moment of release to the moment the spring reaches maximum compression is how many joules? (Air resistance is negligible and $g = 10\,\dfrac{\text{m}}{\text{s}^2}$.)

\textit{[Figure: A block resting on a spring attached to the ground]}

\begin{itemize}
    \item[(1)] $0.3$
    \item[(2)] $1.2$
    \item[(3)] $1.8$
    \item[(4)] $3.6$
\end{itemize}

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