A box ofm=4kgis pulled by forceF=20Nand starts sliding on a table with kinetic friction coefficientµ=0.2as shown in the figure. (Figure does not show all forces acting on the box, and you are advised to sketch the full free body diagram to solve this problem) Friction force isFfric= µNwhereNis the normal force. Take gravitational accelerationg=10 m/s2.
a. Find the net force acting on the box
b. Find the acceleration of the box.