Friction can also be unhelpful. If you don't lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is lost to the surroundings as heat.riction can also be unhelpful. If you don't lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is lost to the surroundings as heat.
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Body image is a person's perception of the aesthetics or sexual attractiveness of their own body. The phrase body image was first coined by the Austrian neurologist and psychoanalyst Paul Schilder in his book The Image and Appearance of the Human Body. Human society has at all times placed great value on beauty of the human body, but a person's perception of their own body may not correspond to society's standards. The concept of body image is used in a number of disciplines, including psycholog