Advantages and Disadvantages of Friction
Trending Questions
Which of the following statements is incorrect?
Friction produces heat.
Friction is never useful
Friction can stop a moving object.
Friction opposes relative motion of objects.
Which of the following options represents the positive effects of friction?
It helps us write
It produces heat in running machines
It produces noise
It helps us walk
When the brake of a train is applied, it slows down. Which of the following force is responsible for it?
Heat into Kinetic energy
Potential energy into heat
Heat into potential energy
Kinetic energy into heat
In which of the following case(s) is friction a friend?
Using pen for writing
Noisy machines
Wearing of machines
Heating of a working mixer
When we rub our hands together, frictional force gives rise to:
Light energy
Heat energy
Electrical energy
Chemical energy
Choose the correct option(s) regarding treading on tyres.
Having treads ensure tyres do not skid or slip on a rainy day
Having treads differentiates one brand of tyre from the other
Having treads in racing cars reduce friction and hence is undesirable
Having treads is advantageous as it increases the thickness of the tyres
In which of the following situation friction is necessary?
Heating of a working mixer
Running of a water motor
Striking a matchstick
None of these
When you rub your hands vigorously, your hands become hot. Why?
Cool
Hot
Nothing
Sleepy
You spill a bucket of soapy water on a marble floor accidentally. Which of the following statements is correct?
It will be easier to walk after the spilling
It will be easier to walk after the spilling because force of friction increase
It will be difficult to walk after the spilling because force of friction increases
It will be difficult to walk after the spilling because force of friction decreases.
Why are vehicle tyres treaded?
To reduce the overall weight of the tyre
To increase friction on wet roads
To decrease friction on rough roads
To decrease grip
