This problem involves forces. We'll use Newton's second law to solve for the unknown force

Newton's second law:

$\overline{){\mathbf{\Sigma}}{\mathbf{F}}{\mathbf{=}}{\mathbf{m}}{\mathbf{a}}}$

Two boxes are connected to each other by a string as shown in the figure. The 10-N box slides without friction on the horizontal table surface. The pulley is ideal and the string has negligible mass. What is true about the tension T in the string?

A) T = 30 N

B) T < 30 N

C) T = 10 N

D) T > 30 N

E) T = 20 N

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