An object of mass M rests on a horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m. There is static friction between the horizontal surface and mass M.

The coefficient of static friction is 0.75 and M=15. kg.

The string and pulley are ideal and massless. Use g=9.8 m/s2.

What is the maximum value of mass m that can be hung from the strong so that mass M does not slide on the surface?

1 answer

mass m is the pulling force, mg
M is being pulled, a maximum of Mg*mu
mg<=Mg*mu