FIGURE P7 39 shows a block of mass m resting on a 20 deg slope The block has coefficients of friction Icirc frac14 s 0 80 and Icirc frac14 k 0 50 with the surface It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2 0 kg a What is the minimum mass ...

Model Assume the particle model for the two blocks and the model of kinetic and static friction Visu ...

FIGURE P7.39 shows a block of mass m resting on a 20° slope. The block has coefficients

Question:

FIGURE P7.39 shows a block of mass m resting on a 20° slope. The block has coefficients of friction Î¼_s= 0.80 and Î¼_k= 0.50 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg.
a. What is the minimum mass m that will stick and not slip?
b. If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have?

20° 2.0 kg FIGURE P7.39