How much work must be done by the brakes

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Q. A thin, circular disc is made of lead and has a radius of 0.0350 cm at 20.0 °C. Determine the change in the area of the circle if the temperature is increased to 625.0 °C. The coefficient of linear thermal expansion for lead is 29.0 x 10-6/C°.

Q. A 70 bicyclist rides his 7.8 bicycle with a speed of 15

How much work must be done by the brakes to bring the bike and rider to a stop?

Reference no: EM1354750

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How much work must be done by the brakes : A thin, circular disc is made of lead and has a radius of 0.0350 cm at 20.0 °C. find out the change in the area of the circle if the temperature is increased to 625.0 °C. The coefficient of linear thermal expansion for lead is 29.0 x 10-6/C°.

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