When one body rolls over the surface of another body, the friction offered is called …………. 

Correct option is: (C) kinetic friction

Correct option is: (A) µs > µk > µr

Correct option is B) friction

B) sliding friction

C) rolling friction

B) 1 – b, 2 – d, 3 – e, 4 – a, 5 – c

D) both a and b are false

A) A-b, B-c, C-a

C) Both Uma and Usha are correct

4. all of these