Work and Energy

Potential Energy Problems


<div class="wp-block-create-block-problemblock">In the system of two blocks and a spring shown below, blocks 1 and 2 are connected by a string that passes over a pulley.  The initially unstretched spring connects block 1 to a ridged wall.  Block 1 is released from rest, initially slides to the right, and is eventually brought to rest by the spring and the friction on the horizontal surface.  Which of the following is true of the energy of the system during the process?<br /><img src="/old/images/springblockphysics.gif"  alt="Spring Block Physics Problem ><br />A. The total mechanical energy of the system is conserved<br />B. The total mechanical energy of the system increases<br />C. The energy lost to friction is equal to the gain in the potential energy gained by the spring<br />D. The potential energy lost by block 2 is less in magnitude than the potential energy gained by the spring<br">E. The potential energy lost by block 2 is greater in magnitude than the potential energy gained by the spring</div>


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