Answer:
For the dry and static friction materials, some of these are Rubber, Aluminum, Gold, Platinum,
Explanation:
High friction materials has higher coefficient of friction (COF).
A booklet is a small book—with fewer pages and smaller dimensions than a “real” book, and usually a paper cover.
Answer: Machines according to Wikipedia is "a mechanical structure that uses power to apply forces and control movement to perform an intended action. Machines can be driven by animals and people, by natural forces such as wind and water, and by chemical, thermal, or electrical power, and include a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement ".
A pulley is a wheel on an axle or shaft that is created to support movement, it makes carry loads easier.
A pulley is a simple type of machine, which in the above explained case makes carrying a load easier.
