block a of mass m is on a horizontal surface of negligible friction. an identical block b is attached to block a by a light string that passes over an ideal pulley. the tension force exerted on block a after the system is released from rest has magnitude t. block b is then replaced by a block of mass 2m and the system again released from rest.. which of the following is a correct expression for the tension force now exerted on block a?
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block a of mass m is on a horizontal surface of negligible friction. an identical block b is attache...
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