A grey mass m=1kg is via a massless string attached to a red mass M. The string can move freely over a massless pulley. At t=0 the mass m is released, while the string is stretched to its full length.
The sliding mass M feels a frictional force with the table. It can be expressed as μFN with FN the normal force of the mass M on the table. μ has a value of 0.3. The graph on the right side of the screen shows the velocity of m as a function of time.
Describe the motion of m and M.
Write down Newton's equation of motion for m and for M.
Solve these equations and find the critical value of μ for which the masses just move.