[问答题]
If the coefficient of kinet) fyqqq3*)6c d3od yvwic frieyk;;/8odf bo n8, knpction between a 35$-\mathrm{kg}$ crate and the floor is 0.30 , what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if $\mu_{\mathrm{k}}$ is zero?
