WorksheetsFriction
Total questions: 8
Worksheet time: 4mins
What is friction?
Force
Force opposes any relative motion
Motion
None of the above
What is the limiting force of friction?
the force which limits friction
Motion
The maximum value of friction between two surfaces
none of the above
Which of the following is true?
Static friction > Sliding friction > Rolling friction
Static friction < Sliding friction > Rolling friction
Static friction < Sliding friction < Rolling friction
Static friction = Sliding friction = Rolling friction
Why friction is a necessary evil?
it causes wastage of fuels
it causes wastage of chemicals
it causes wastage of time
it causes wastage of energy
Give examples of increasing the friction-
Adding lubricant to machines
Adding grooves on tires
Adding oil between the door joints
Adding chalk powder to hands
Give examples of decreasing friction-
Adding spikes to shoes
putting ball bearings in motors
Polishing jewels
breaking a polished surface
Another name for specially shaped bodies to reduce friction---------.
Streamline flow
streamlined bodies
Air cutters
friction reducing bodies
The force of fluid friction depends on
the quality of the object
light fluid
salty fluid
nature of the fluid
