The tension in a string is the sum
of the forces acting on each end.
Two 10 N weights are tied to the ends of a string, which is hung
over two frictionless pulles, as shown below. What is the tension in
the string? Explain your answer.
Students that suffer from this misconception will state that the
tension in the string is 20 N.
Related misconceptions/student difficulties that may arise in the
transmit (unchanged) an external force acting on one object to
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