to light a matchstick when there is a blackout.
They design and build things that we as humans use everyday. These designs make our lives much more easier.
yes. there is friction to resist every movement we make
so it was easier for them
Use Cd's as wheels to make less friction
To increase friction, you can increase the weight pressing the surfaces together, roughen the surfaces in contact, or use a material with higher friction properties.
Friction Is the Force that makes it harder for two things to move against one another. 1) When I rub my hands I make friction. 2) When friction is used , energy is produced.
use bigger wheels and use less friction on the ground make it weigh less
the water floods over and kills the plants and forces humans and animals to move
To make carrom board smooth and to reduce friction
Tools or their hands.
for the lumber to make homes
To reduce friction, you can use lubricants such as oil or grease, polish the surfaces to make them smoother, use ball bearings or rollers, or introduce a layer of Teflon or other low-friction material between the surfaces in contact.