Advertisements
Advertisements
Question
Define rolling friction
Solution
The minimum force required to roll a body on a surface is called the force of rolling friction.
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
We use ball bearings to .................. the friction.
Arrange the following in descending order:
- static friction
- sliding friction and
- rolling friction?
State if the following statement is true or false. Correct the statement if it is false.
Like charges always attract each other.
Answer the following in short.
Define force. Write its SI unit.
Tick the most appropriate answer.
Friction produces
Fill in the blank.
Smoother the surface, ................. is the frictional force offered by it.
Answer the following in short.
How can sliding friction be changed into rolling friction easily?
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
Assertion: Friction always opposes the motion.
Reason: Whenever one surface moves or tries to move over another surface, the force of friction starts acting on the surfaces.
