A 5kg box on a horizontal table is pushed by a horizontal force of 15N. If the coefficient of friction is 0.4, will the box move? what is the smallest force that could make the box slide along the table?

Answer 1

the frictional force is
... 5 * 9.8 * .4

Answer 2

F=mk
F= m(mg)
F= 0.4(5)9.8
F= 19.6