Advertisements
Advertisements
प्रश्न
Select the correct alternative.
Friction is reduced by
पर्याय
making the surfaces wet
making the surfaces dry
making the surfaces rough
sprinkling sand on the surface.
Advertisements
उत्तर
making the surfaces wet
APPEARS IN
संबंधित प्रश्न
Friction depends on the ______ of surfaces.
Explain why sportsmen use shoes with spikes.
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
Name the two kinds of forces in nature.
Fill in the blank.
Rolling friction offers ............. resistance than sliding friction.
Fill in the blank.
Sliding friction and rolling friction are types of .................. friction.
Tick the most appropriate answer
Friction always
Match the following.
| Column I | Column II | |
| a) | Static friction | viscosity |
| b) | Kinetic friction | least friction |
| c) | Rolling friction | objects are in motion |
| d) | Friction between the liquid layers | objects are sliding |
| e) | Sliding friction | objects are at rest |
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.
Analogy
Objects placed at rest on earth: ______:: Bodies slide over the surface on other body: ______.
