5. Two blocks of masses 2 kg and 4 kg on a surface are in contact with each other, and a force F is applied to the 2 kg mass as shown in the figure. The two blocks are accelerating forward with an acceleration of 1 m/s2. The coefficient of kinetic friction between the blocks and the horizontal surface is 0.35.


 
 
 

a. (4 points)

Draw free body diagrams for the two blocks, showing all forces acting on each block.


 
 
 
 

b. (7 points)

Calculate the frictional force on the 2kg and also the 4kg block.