In the system of two blocks and a spring shown above blocks 1 and 2 are connected by a string that passes over a pulley The

Question

In the system of two blocks and a spring shown above blocks 1 and 2 are connected by a string that passes over a pulley The initially unstretched spring connects block 1 to a rigid wall Block I is released from rest initially slides to the right and is eventually brought to rest by the spring and by friction on the borizontal surface 20 Which of the following is true of the energy of the system during this process A The total mechanical energy of the system is conserved B The total mechanical energy of the system increases BURBERR A Block 2 www The energy lost to friction is equal to the gain in the potential energy of the spring D The potential energy last by block 2 is less in magnitude than the potential energy gained by the spring E The potential energy lost by block 2 is greater in magnitude than the potential energy gained by the spring Cor 100 Isive SAT 21 After block 1 comes to rest the force exerted on it by the spring must be equal in magnitude to A zero B the frictional force on block C the vector sum of the forces on block I due to friction and tension in the string D the sum of the weights of the two blocks E the difference in the weights of the two blocks

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