Loading...
Meena rolls a marble with the same push on a grassy lawn and on a smooth cemented floor. The marble stops sooner on the lawn because:
Which of these is a DISADVANTAGE of friction?
Friction arises because of tiny irregularities (bumps) on the two surfaces in contact.
Why is fine powder sprinkled on a carrom board before playing?
In an activity, a wooden block is pulled with a spring balance across three surfaces. The reading just as the block starts to move is: glass sheet 2 N, wooden table 3.5 N, sandpaper 6 N. (a) On which surface is friction greatest? (b) Arrange the surfaces in increasing order of friction. (c) What do you conclude about friction?
'Friction is both a friend and a foe.' Justify the statement with two examples of each, and suggest two ways of reducing friction where it is not wanted.
© 2026 PadhAiPro. This question is provided for educational purposes.
