Question

In a figure a body A of mass m slides on plane inclined at angle ${\theta }_1$ to the horizontal and $\mu$ is the coefficient of friction between A and the plane.A is connected by a light string passing over a frictionless pulley to another body B,also of mass m, sliding on a frictionless plane inclined at an angle ${\theta }_2$ to the horizontal. Which of the following statements are true?

• A. A will never move up the plane
• B. A will just start moving up the plane when $\mu =\frac{sin{\theta }_2-sin{\theta }_1}{cos{\theta }_1}$
• C. For A to move up the plane , ${\theta }_2$ must always be greater than ${\theta }_1$
• D. B will always slide down with constant speed

Answer 1

The correct option is A A will never move up the plane

Hence A will never move up the plane.