Which of the following will produce the maximum friction?
A. rubbing of sand paper on glazed paper
B. rubbing of sand paper on glass table top
C. rubbing of sand paper on aluminium frame
D. rubbing of sand paper on sand paper
Answer:A
Which of the following will produce the maximum friction?
A. rubbing of sand paper on glazed paper B. rubbing of sand paper on glass table top C. rubbing of sand paper on aluminium frame D. rubbing of sand paper on sand paper