Physics

Problem

A horizontal force of

25\,\text{N}

is just sufficient to set a

10\,\text{kg}

wooden block in motion on a horizontal concrete floor. Once the block starts sliding, a steady force of

20\,\text{N}

keeps it moving with uniform velocity. Calculate the coefficients of static friction

(\mu_s)

and kinetic friction

(\mu_k)

between the wood and concrete.