Question

In the given figure the pulley is assumed massless and frictionless. If the friction force on the object of mass m is $f$ , then its acceleration in terms of the force $F$ will be equal to:

• A. $(F-f)/m$
• B. $\left( \frac{F}{2}-f \right)/m$
• C. $F/m$
• D. none of these

Answer 1

Answer: (B)

$\left( \frac{F}{2}-f \right)/m$

Answer 2

To find the acceleration of the block we will need the tension in the string, that can be obtained by considering the pulley as the system.