which of these is an example showing undesirable friction A. pushing a table B. lighting a matchstick C. holding a pen to write D. stomping the car's breaks
Because you never know that you used friction to move the pencil because you used only small friction to move the pencil that’s why it’s show undesirable friction.
Answers & Comments
Answer:
letter a I'm sure pa brnlst and spm ty
Answer:
C. holding a pen to write
Explanation: