How are the following used to reduce friction? give one example for each
options in picture
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Answers
Answer:
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Explanation:
a) Lubrication reduces the heat generated when two surfaces are in motion. It smoothes the process by forming a film between two surfaces that reduces friction and thus improves performance and efficiency. There are different variety of lubricants and oils available such as Engine Oil, Hydraulic Oil, and Greases
b) Vents or currents of slow-moving, low-pressure air are ejected downward against the surface below the hovercraft. ... The cushion greatly reduces friction, allowing the vehicle to glide freely over the smooth surface below.
c) Dry talcum powder reduces friction slightly for certain materials against skin, but increases friction when it becomes wetted. ... Once movement has been initiated the force required t-o maintain it usually decreases and the ratio of frictional resistance to load then gives tbe coefficient of kinetic friction .
d) A wheel reduces friction by allowing the contacting surfaces to roll rather than to drag or slide over each other. By reducing friction, a wheel can enable you to use less force to move an object. The less force you use to move an object, the easier your work becomes.
LUBRICANT:
Lubrication reduces the heat generated when two surfaces are in motion. It soothes the process by forming a film between two surfaces that reduces friction and thus improves performance and efficiency. There are different variety of lubricants and oils available such as Engine Oil, Hydraulic Oil, and Greases.
AIR CUSHION:
The air cushion is filled with air. As friction experienced by a solid on a liquid than a solid on a solid, the hovercraft fitted on the top can move freely.
TALCUM POWDER:
Talcum powder is developed from talc, or magnesium silicate. When it is finely ground into a soft white powder, talc absorbs moisture and helps reduce friction, which is why it has long been used to keep skin dry and prevent rashes.
ROLLER WHEELS
A wheel reduces friction by allowing the contacting surfaces to roll rather than to drag or slide over each other. By reducing friction, a wheel can enable you to use less force to move an object. The less force you use to move an object, the easier your work becomes.
Hope it helps :)