Question
Download Solution PDFWork done by friction in case of pure rolling is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
- Rolling friction: When objects such as a wheel (disc or ring), sphere, or a cylinder roll over a surface, the force of friction that comes into play are called rolling friction.
- Rolling friction is directly proportional to the normal reaction (R) and inversely proportional to the radius (r) of the rolling cylinder or wheel i.e.
\({F_{rolling}} = \frac{{{\mu _r}R}}{r}\)
Where μr = the coefficient of rolling friction.
EXPLANATION:
- Work done by pure rolling is always zero.
- It is because there is no relative motion between the point of contact of the object and the surface i.e the displacement of the point of contact of the object is zero.
- As we know that W = force × displacement = Fs
As s = 0
∴W = 0
- Only in case of rolling with sliding, friction does work.
Last updated on Jun 20, 2025
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