Question

In the figure shown below, an external force of 20 N is applied to a block and a frictional force of 10 N acts. Now another block is placed over it. Comment on the friction between the ground and the block.
⬛⤵w = 100N
⬛w = 100N ⬅F = 20N
➡ F = 10N

Answer 1

Answer:

now your answer is 0 as frictional force=-20(total)

and muscular force=20

sum=20-20

=0

Answer 2

the answer is 0 because of 0 is added and 0