Advertisements
Advertisements
प्रश्न
Answer the following in short.
Define rolling friction and give an example where rolling. friction comes into play.
उत्तर
When we roll an object on a surface, the friction produced between the object and the surface is called rolling friction. Example: when we pull our large suitcases on wheels, rolling friction comes into play. The wheels reduce friction and cut down a lot of effort required to move the suitcase (Rolling friction is less than sliding friction).
APPEARS IN
संबंधित प्रश्न
Write true or false.
The sliding friction is more than the rolling friction.
Name the three kinds of friction.
The eraser gets smaller and smaller as you use it more and more. Explain the reason.
Answer the following in short.
Define force. Write its SI unit.
Tick the most appropriate answer
Friction always
Tick the most appropriate answer.
Friction is offered by
Tick the most appropriate answer.
Friction for an object can be reduced by
Answer the following in detail.
Write the characteristics of the force of friction?
Complete the analogy.
Knot in a thread : _____ friction : : Ball bearing : _____ friction
We have two identical metal sheets. One of them is rubbed with sand paper and the other with ordinary paper. The one rubbed with sand paper shines more than the other. Give reason.
