Question

A light string passing over a frictionless pulley has masses attached to its ends as shown in the figure. The tension in the thread will be

• A. $45\text{N}$
• B. $90\text{N}$
• C. $70\text{N}$
• D. $75\text{N}$

Answer 1

The correct option is D $75\text{N}$

We know that by the force equations, tension in the thread is given by $T=\frac{2m_1{m}_2}{m_1+m_2}g=\frac{2\times 10\times 6}{10+6}\times 10=75\text{N}$

Hence option D is the correct answer