A. rolling, static, sliding B. rolling, sliding, static
C. static, sliding, rolling D. sliding, static, rolling
A. Wet marble floor, dry marble floor, newspaper, towel.
B. Newspaper, towel, dry marble floor, wet marble floor.
C. towel, newspaper, dry marble floor, wet marble floor.
D. Wet marble floor, dry marble floor, towel, newspaper.
A. helps the motion B. oppose the motion
C. both of these D. none of these
A. contact force B. non-contact force
C. magnetic force D. none of these
A. less frictional force
B. more frictional force
C. sometimes less and sometime more force
D. all of these
A. increase friction
B. decrease friction
C. increase or decrease friction
D. none of these
A. Gases B. Liquids
C. gases and liquids both D. none of these